Common Google Ads Mistakes Contractors Make, Ordered by Cost

Most Google Ads mistakes leave your clicks and impressions looking healthy. Here are the expensive ones, in order of cost, and how to check each one yourself.

By Gavin Sevastian · Updated August 11, 2026 · 6 min read

Your account is spending. Clicks are up. The click-through rate looks respectable. And the phone is ringing about as much as it was six months ago.

Every mistake on this page leaves those numbers looking fine. That is not luck and it is not a coincidence. It is the reason these problems survive for years inside accounts somebody logs into every week. Clicks and impressions measure whether the auction is working. Neither one knows whether a job got booked.

The list is ordered by what each mistake costs, not by how often it gets written about. That ordering is why bid adjustments and ad copy testing sit near the bottom, despite taking up most of the space in almost every other article on the subject.

One honest note before it starts. Every fix below takes minutes. Every verification takes real skill. And the account drifts afterward whether or not anyone is watching it. That gap is the actual work, and there is a section near the end that deals with it plainly instead of turning it into a pitch.

Why these mistakes never show up in the numbers you check

The overview screen answers one question well: is the auction working? Clicks, impressions, click-through rate and average cost per click all answer it. None of them knows whether your phone rang, or whether the person who clicked lives anywhere near you.

The metrics that stay green no matter what

Out-of-area clicks are still clicks. A click from somebody hunting for a job at your company looks identical, in every column, to one from a homeowner with a leaking roof. Broken conversion tracking does not announce itself either. It shows up as an unremarkable number nobody reads as an alarm.

So the usual version of this is not a crisis. It is a long, mild, expensive shrug. If you are already asking why the calls are not coming in, the answer is usually in a report nobody has opened.

The five screens that actually show the problem

Every one of those right-hand columns is a click or two off the main screen. None of them is hidden. They just do not get opened, because nothing on the front page suggests a reason to.

Why it looks fine is the expected reading

Fixing some of these makes your dashboard look worse. Impressions drop, click volume drops, and the chart goes down while the account gets better. That is the shape that makes an owner nervous and makes a weak agency change it back.

You do not have to take that on faith. Google says it about the setting in the next section.

Mistake 1: No conversion tracking, or conversion tracking that counts the wrong thing

This is first on cost because it gates everything below it, and the case comes straight out of Google's own documentation on match types and Google's definition of Smart Bidding.

The chain runs like this. Keywords default to broad match, which Google calls "the default match type that all your keywords are assigned because it is the most comprehensive." About that same match type, Google says: "It's critical to use Smart Bidding with broad match." Smart Bidding is defined as the strategies that "optimize for conversions or conversion value in every auction." And Smart Bidding cannot run without conversion tracking.

Read that end to end. An account with no conversion tracking is running Google's broadest matching with the one control Google says that matching needs switched off. That is a documented mechanism, not a matter of taste, and it is why nothing else on this page can be judged until tracking works. If you are weighing up which bid strategy to use, this question comes first.

Installation is not proof that conversion tracking works

A sound setup distinguishes completed enquiries from weaker events, covers calls separately from forms, and separates actions used for bidding from actions kept for observation. The evidence that matters is an actual customer path producing the intended record after the normal reporting delay. A tag status or a page-view count proves much less than most dashboards imply.

The tracking that is worse than no tracking

The more common failure is not missing tracking. It is tracking that counts the wrong thing: a conversion firing on a page load, on a tap of a phone number that never connected, on a four second call, or on the same person twice in an afternoon.

That is worse than measuring nothing, because it produces a number that looks like success. Automated bidding then does what it was built to do and buys more of whatever produced it. A rising conversion count next to a flat number of booked jobs is the signature.

What to check: open each conversion action and read the event it fires on, not the name somebody typed in the box.

Phone calls and forms are two separate jobs

For many contractors, phone leads are a major path, and Google lists phone call conversions as their own category, covering calls placed from ads, calls to a number on your website, and taps on a number on a mobile site. Each is a separate setup from a form conversion.

So a form-only account can be entirely correct and still miss real phone leads, leaving every bidding decision built on the customers who type rather than dial. It is a common reason an account that is not producing calls appears, on paper, to have no tracking problem.

What to check: whether call tracking exists separately from the form conversion, and whether it counts calls that connected rather than taps.

Mistake 2: Location targeting that reaches people who are only interested in your area

Setting your service area and setting your targeting method are two different actions, and it is easy to complete the first while missing the second. Google's documentation on advanced location options spells out what the default does.

Presence versus presence or interest, in plain terms

In Google's words, the default "lets you reach people who are likely to be in or regularly present in your targeted location, as well as people who have shown interest in your targeted locations."

For a business that has to drive a truck to the job, the second half of that sentence is money leaving the account. Somebody in Vancouver reading about basement waterproofing in Toronto can be shown your ad, and can click it, and that click costs what a real one costs. Google's warning about the fix sits on that same page: most campaigns see fewer impressions after switching to presence.

What to check: the targeting method on every campaign, not just the list of cities you typed in.

Why adding excluded locations does not fix it

Inclusion and exclusion do not work the same way, and this catches out people who know the platform well. Google's API documentation states that negative geo targeting defaults to presence and can no longer be set to presence or interest for Search campaigns. You cannot exclude somebody who is merely interested in a city.

So a long list of excluded regions does nothing about the traffic this mistake generates. Changing the targeting method is the only lever that touches it.

What to check: the setting on campaigns added after the first one. It lives at campaign level, which is why it gets fixed once and then quietly missed forever.

The case for Google's default, and why it is not your case

The default is not a trap. It is a deliberate recommendation with published evidence behind it: advertisers in the Travel, Real Estate and Education verticals who switched to the broader option saw "+5% more conversions on Search campaigns," according to Google internal data cited on that same page.

Look at those three verticals though. Every one sells to somebody who is not standing in the building. You do book a Paris hotel from Toronto, and you do choose a university from another province. Nobody hires a Whitby furnace technician from Calgary. Across a service radius you can actually drive, interest is not demand.

What to check: the geographic report, read for where your clicks came from rather than where you meant to advertise.

Mistake 3: No negative keywords, and negative lists that quietly leak

There is no setting anywhere in the platform that limits your ads to the words you actually typed in. Every match type, exact included, can expand to close variants, so the set of searches your ads appear against is always larger than the set of keywords you added. Google says that around 15 percent of the searches it sees each day are new, which is why this job has no finish line.

What negative keywords are, and what they are not

A negative keyword stops your ad from showing against searches containing that term. Simple enough. What it is not is a filter on intent, because it has no idea what anyone meant. It matches text.

For trades, the predictable waste falls into five groups. People looking for work rather than a contractor, searching wages, apprenticeships and who is hiring. People doing it themselves, searching how to and what causes. Shoppers buying a unit or a part instead of hiring an installer, which quietly eats a lot of budget in HVAC accounts in particular. Adjacent trades you do not actually offer. And competitor brand names, where the searcher already has somebody in mind. A plumbing account with no exclusions collects all five, every month, in proportion to how good its keywords are.

What to check: whether your account has any negatives at all, before you worry about whether they are the right ones.

Why your negative list leaks (negatives do not match close variants)

Here is the part that catches out people who have run accounts for years. Google's documentation on negative keywords states it directly: "Negative keywords won't match to close variants or other expansions." Their own example is that excluding "flowers" stops the ad on "red flowers" but not on "red flower".

Sit with the asymmetry for a second. Your keywords expand on their own, continuously, into forms you never wrote. Your exclusions do not move at all. The gap between them widens by itself, and nothing in the interface tells you it is happening.

One correction while you are here, because a lot of older advice has this backwards. Google says: "you'll need to add synonyms and singular or plural versions if you want to exclude them. Negative keywords automatically account for casing and misspellings, so you don't need to add those separately." Capitalisation and typos are covered. Meaning and number are not.

What to check: take three negatives you added a year ago and search the report for their singular, plural and nearest synonym.

Negative keywords are a judgment about the business, not a cleanup button

The useful unit is the unwanted intent pattern, but the dangerous unit is the service you accidentally suppress. That is why exclusions need context from the actual work the contractor sells, not a generic list pasted across accounts. Spend should shape the priority, while the effect on eligible service traffic is what keeps the decision honest.

Negatives cut both ways, and almost nobody writes about the second direction. Google's guidance says plainly that "if you use too many negative keywords, your ads might reach fewer customers." An over-broad exclusion suppresses work you actually want, silently, with no notification and no flag. If impressions fall and nothing else changed, audit the negative list before you audit anything else.

Worth being honest about one more thing: whether an exclusion saves money or just moves it depends on the bidding strategy. On some strategies the campaign spends its budget either way, and the exclusion changes where the money goes rather than whether it goes. That is still a good trade. It is not the same as a refund.

What to check: whether your exclusions live on one campaign or apply across the account.

Mistake 4: Sending every ad click to your homepage

A homepage is built to represent a business. A landing page is built to answer one search. Those are different jobs, and a page doing the first one is doing the second badly by design.

What a landing page costs you twice over

Somebody who typed "emergency furnace repair" and arrives on a page with a hero image, six service tiles, an about section and a general contact form has to find their own answer. A share of them will not bother. That is the obvious cost.

The second cost is the one most articles miss. Google's explanation of Ad Rank lists the inputs as "your bid amount, the quality of your ads and landing page, the Ad Rank thresholds, the competitiveness of an auction, the context of the person's search" and others. So the destination page is not only converting fewer of the people who reach it. It is also feeding the calculation that decides your position and your price. Google puts the upside plainly: "even if your competition has higher bids than yours, you can still win a higher position at a lower price by using highly relevant keywords and ads."

A weak destination therefore charges you at both ends. You pay more per click and convert fewer of them.

What to check: the final URL on your highest-spending ad group, not the URL you assume is there.

Message match, not just a dedicated page

The reason homepages persist as ad destinations is a business reason, not a technical one. Service pages take real work to build and real attention to keep current. The homepage already exists and somebody already paid for it.

But "make a landing page" is not the fix on its own. A dedicated page that still does not name the searched service in the first screen is no better than the homepage it replaced. Message match is the actual principle: the search, the ad and the first thing on the page all say the same thing. A roofing account running flat roof repair, shingle replacement and eavestrough work through one generic page is running three campaigns into one answer.

The practical test is message continuity: the paid search, the ad promise and the first screen of the destination should describe the same job. If the service only appears after navigation or scrolling, the visitor is being asked to repair a mismatch the advertiser created.

What landing page experience actually measures (and what it does not)

Google's Quality Score documentation defines landing page experience as "how relevant and useful your landing page is to people who click your ad." Relevant and useful is broader than technical hygiene alone.

That distinction matters because a lot of advice conflates the two. Page speed and technical cleanliness can support the experience, but neither substitutes for relevance. A quick, technically tidy page that does not answer the search still misses the core of what this component evaluates.

What to check: the landing page experience column at keyword level, read as a comparison rather than a grade.

Mistake 5: Nobody reads the search terms report

Two different things share almost the same name, and mixing them up is the root of most wasted spend. A keyword is what you added. A search term is what a person actually typed. Google's documentation on the search terms report is where the difference between the two becomes visible, and it is the only place it does.

Search terms versus keywords

The previous section is the fix. This section is the habit that tells you what to fix. Match expansion is continuous, so the mix of real searches your ads serve against drifts on its own even in a month where you changed nothing at all. Competitors enter, seasons turn, and the language people use moves.

That makes this a recurring task and not a launch task. It is also the single best question an owner can ask about their account, which is why it belongs near the top of any list of ways to tell whether an agency is actually doing the work. Reading the search terms report is unglamorous, cannot be automated away, and shows up immediately in what you spend.

What to check: the date on the last time anyone opened it.

What a useful search-term review is trying to decide

The report matters because it exposes the gap between the keywords you chose and the searches you funded. Cost gives that gap business weight, while a sufficiently long window keeps an unusual day from becoming policy. Each visible term still requires a judgment: desired demand, clearly irrelevant intent, or too little evidence to call.

What the report will never show you

This is where most articles overpromise, so here is the honest version. Google says the report contains "the search terms that were used by a significant number of people," and that "some search terms that don't have enough query activity are omitted from the search terms report in order to keep with our standards on data privacy." Low volume queries get folded into themes or into an aggregate without the queries themselves ever being shown.

The reason matters for local businesses specifically. In a 2021 announcement explaining the change, Google described thresholds that report only on terms "that have seen sufficient search volume across all Google searches." Across all Google searches, not across your account. An unusual location-specific query may never clear that global threshold, no matter how long your account runs or how much history it builds. That can include traffic a contractor most needs to understand.

Two things follow from that, and both are practical. Reactive exclusions built from what you can see will always be incomplete, so preemptive categories still earn their place. And nobody should ever tell you that enough time in the report gives you the full picture.

What to check: whether your exclusions cover categories you predicted, or only ones you have already paid for.

Mistake 6: Chasing Quality Score instead of the thing Quality Score measures

Nearly every article on this subject tells you to improve your Quality Score to lower your cost per click. Google's own Quality Score documentation says something quite different, and the gap between the two is a useful test of whether the person advising you has read the source.

What Google says Quality Score is not

Two sentences do the work. Google states that "Quality Score is not a key performance indicator and should not be optimized or aggregated with the rest of your data." And more pointedly: "Quality Score is not an input in the ad auction. It's a diagnostic tool."

So the column is a readout, not a lever. What genuinely enters the auction is ad and landing page quality, assessed live for each search through Ad Rank, as covered in the previous section. The number in your account is a lagging summary of that assessment. You cannot optimise a summary. You can only change the underlying relevance and wait for the summary to catch up.

The three components, and which one to read first

The three parts are expected click-through rate, ad relevance, and landing page experience, each rated against other advertisers who appeared for the same search over the previous ninety days. Read them as a diagnosis rather than a grade, and read them in that order of usefulness for a small account: landing page experience tends to be the one you can actually move, ad relevance is the cheapest to fix, and expected click-through rate is heavily shaped by how often your ads get to show at all.

Reading it as a diagnostic instead of a target

Used properly, the column answers one question: which of the three things is weak on this keyword. That is genuinely worth knowing, and it points at work that pays.

Used as a target, it becomes theatre. An account with a rising average Quality Score and a flat number of booked jobs has not improved, and the number will not tell you that. The measures worth reporting on in a small business account are jobs won and what they cost. Everything else, including this, is instrumentation.

Mistake 7: Letting Google change the account while nobody is watching

The recommendations screen is not a trap and the people who built it are not acting in bad faith. It is a system optimising a different objective from yours, and that difference is structural rather than moral.

Why Google's recommendations are not automatically your recommendations

Google's recommendations are built to improve outcomes across an enormous population of advertisers. Most of that population is not a contractor who can only serve a forty kilometre radius, only sells four services, and only has so many trucks. Advice that raises the average across millions of accounts can still be wrong for yours, and there is nothing sinister in that. It is what an average does.

The optimisation score sitting above those recommendations reinforces it. A number that goes up when you accept suggestions and down when you decline them creates a pull toward acceptance, regardless of whether a given suggestion suits your business. Treat it as a list of things worth evaluating, never as a scorecard you owe a good result on.

This is also the sharpest question to put to anybody managing your account. Not "what is our optimisation score" but "what have you declined recently, and why." An account where every recommendation has been accepted has not been managed. It has been agreed with. That question belongs on any short list of ways to judge whether an agency is doing the work.

What to check: whether anyone can name a recommendation they declined and give a reason.

Recommendations that are usually wrong at a contractor's budget

Some categories come up over and over and are worth extra scrutiny before you accept them.

Broadening keyword matching, without a matching expansion of your exclusions, adds reach in exactly the direction that generates the waste covered earlier on this page. Adding Search Partners or display expansion moves your money onto surfaces where intent is thinner than it is on a Google search result. Switching bid strategy before the account has enough conversion history sets an automated system loose on a sample too small to steer with, which is the same underlying problem as the one in the first mistake, wearing a different hat.

None of those is automatically wrong. Each is a real setting with real cases where it wins. The problem is accepting one because a suggestion appeared, without knowing which case you are in.

The first hour in a new account

The highest-return hour in the whole life of an account is the first one, spent going through the defaults and deciding which ones to keep. Location targeting method, network settings, match types, conversion actions, bidding. Each is one decision, made once, that then governs months of spend.

Almost nobody spends that hour. The campaign gets built, it starts serving, and the defaults quietly become permanent because nothing ever forces a review of them. Every mistake earlier on this page is a default nobody overruled at the start.

What to check: the settings that were never deliberately chosen, which is most of them in most accounts.

Mistake 8: Ad copy that is literally true and still breaks Canadian advertising law

This one is absent from every American article on the subject, and it applies to you. The Competition Bureau on misleading representations states that "it is against the law for businesses and individuals to advertise or market goods and services to Canadians in a way that is false or misleading," and defines a representation as "any marketing material, including online and in-store advertisements." Your Google ads are covered.

The general impression test, and why 30 characters makes it hard

The part that surprises people is the standard being applied. Under the Competition Bureau's general impression test, a court "is required to take into account the general impression conveyed by the representation, in addition to its literal meaning." The Bureau then describes the failure case precisely: a message that "is literally true but misleading because it does not include or state essential information that would likely influence consumer behaviour."

Now look at the format you are writing in. A responsive search ad headline supports up to thirty characters. Omission is not a temptation at that length, it is the default condition. Every qualifier you know about the claim gets left out because there is physically nowhere to put it.

What to check: each headline read cold, as a stranger would read it, with none of the context you carry in your head.

Price, availability and warranty claims in ad copy

Three categories cause almost all of the exposure.

Price claims. "Roofing From $499" may be perfectly true of one small repair on one accessible roof and still create an impression the vast majority of your jobs will not honour. Availability claims. "Same Day Service" may hold for one municipality on weekdays before noon, and read as a promise everywhere else. Warranty claims. "Lifetime Warranty" almost always carries conditions on materials, on labour, on transfer to a new owner, and none of them fit in the headline.

The awkward reality is that the more compelling the short claim, the more likely it is doing its work through what it leaves out.

Performance claims need testing done first

Claims about how a product or service performs sit under their own heading in the Bureau's material: performance not based on adequate and proper tests. The order in that phrase is the whole point. The testing has to exist beforehand, not be assembled afterwards if someone asks.

That covers a headline like "cuts your heating bill 40 percent." If a manufacturer has published testing that supports it under stated conditions, you are standing on something. If it is a number that felt about right, you are not.

What to check: every number, every superlative and every time-bound promise in your live ads, against what you could actually evidence.

Mistake 9: Missing the calls your ads already paid for

Every missed call is a click you have already bought. That much is obvious to anyone who has ever looked at a phone bill next to an ad invoice.

What a missed call costs beyond the missed job

The part that is not obvious is what happens next. Somebody with a burst pipe does not leave a voicemail and wait. They go back to the results page and call the next company, which means you paid for the click that generated their job somewhere else.

Google's Call details report does include a missed-or-received status. What it does not provide is a separate state proving that a person answered and held a useful conversation. AI-qualified recording can add more evidence for eligible calls, while other calls still rely on duration or an interaction estimate. Reconcile the report with the business phone log before blaming traffic for calls the office did not answer.

Why Local Services Ads punish slow response specifically

On Local Services Ads it costs you twice, and this one is documented. Google's Local Services Ads guidance for Canada tells providers to respond to as many messages as they can, "even if you decline to provide the requested service."

Worth knowing before you plan around this: Local Services Ads only run for certain service categories, and the Canadian list is shorter than the American one. Several common trades are not on it at all. Check Google's own eligibility page rather than trusting any list you read elsewhere, including this one, because it changes. If you are weighing the format up, start with how Local Services Ads work for contractors and what the Google Guaranteed process involves.

The fix is scheduling, not bidding

This is an operations problem wearing an advertising costume, and no amount of account work touches it. If calls go unanswered between four and seven in the evening, no bid adjustment, no new ad copy and no budget change fixes that. Coverage during those hours fixes it, or a service that answers on your behalf does.

What to check: your call log against your ad schedule, looking for the hours where you are paying for clicks you cannot answer.

Mistake 10: Adding budget to a broken account, or judging it before it can be judged

Two errors that look like opposites. Both come from the same root, which is not knowing what state the account is actually in.

Why more budget on a broken account buys more waste

The first is "it didn't work, so we spent more." On an account with the problems described above, extra budget does not buy extra jobs. It buys proportionally more out-of-area clicks, more job seekers, and more visitors landing on a page that does not answer their search. Spending scales whatever structure it lands on, including the broken parts.

Fix tracking, targeting, exclusions and destination first. Those are permanent and they compound. Bid and budget changes have diminishing returns and reverse the moment you stop paying for them. There is a sensible way to size what to spend, and it starts after the structure holds, not before.

Google's own bar for judging a change

The second error is pulling the plug at two weeks. Here the honest constraint is Google's own published guidance rather than anyone's opinion: to evaluate results accurately, Google recommends measuring performance "over longer time periods that have at least 30 conversions, such as a month or longer," and fifty conversions for Target ROAS.

Say the consequence out loud, because it answers the most reasonable objection anyone has to paying for this work. If a meaningful change takes a month to judge, then changing three things in a month means judging none of them. Sequencing is the skill. The button clicks are not. This is also why the honest answer on timelines is longer than most people want to hear.

Comparing ad cost to referrals honestly

Contractors say a version of this constantly: Google Ads leads cost more than word of mouth. Referrals feel free, and the reason they feel free is that their acquisition cost is invisible, not that it is zero. It is paid in years of reputation, in the jobs you did below margin to keep somebody happy, and in a volume ceiling you do not control.

The fair comparison is cost per booked job against what a job is worth to you, not cost per lead in isolation. A channel producing expensive leads that close at a high rate on large jobs can beat a cheap one that does not. Working that out for your own numbers is the actual question behind whether Google Ads is worth it for your trade, and it needs your close rate and your average cost per lead by trade, not an industry average.

What to check: what a booked job is worth to you, before you decide any cost per lead is too high.

What fixing these actually involves

Here is the honest asymmetry, and it is the strongest argument on this page in either direction. Every fix above takes minutes. Every verification takes real skill. And the account drifts afterward whether or not anyone is watching it.

The fix takes minutes, the verification does not

Every row has the same shape. The action is trivial. The judgement behind it is the job.

Why the account drifts even when you change nothing

Around fifteen percent of what people type into Google each day is new. Your keywords expand into those searches automatically. Your negatives, as covered earlier, do not move at all. That alone widens the gap month over month with nothing happening on your side.

On top of it, competitors enter and leave the auction, seasons change what people search for, your own quality assessment is graded against whoever else showed up this quarter, and the platform ships changes you did not ask for. Nothing about search advertising reaches a stable state and then stays there. An account that was well built two years ago and untouched since is not a well built account any more.

Doing it yourself, honestly

You can absolutely do all of this. Nothing above requires a certification, expensive software, or permission from anyone. The constraint is not intelligence and it is not access.

The constraint is recurring attention against a system that changes underneath you. An hour a month, spent consistently, on the right five screens, beats a heroic weekend once a year by a wide margin. Some owners genuinely have that hour and the discipline to protect it. Most find it goes to the job that is on fire that week, which is a rational choice and also how accounts decay.

That is the actual decision. Not whether the platform works, and not whether you are capable of it. Whether this gets a recurring slot in your week, from you or from somebody you pay for it, and what that costs against what it saves.

The first question worth settling

Before changing bids, ads or budget, settle whether the account is measuring the outcome you care about. Reliable measurement tells you whether the next problem is traffic, geography, destination quality or call handling. Without it, every improvement is being judged through the same broken instrument.

That leaves an honest ownership decision. The account needs recurring judgment as searches, seasons and the business change. You can protect time for that work yourself, buy a periodic second set of eyes, or make it somebody's standing job. If the third option fits, I manage Google Ads specifically for contractors.