Bad Data, Bad Results: 5 Google Ads Mistakes That Make Google Optimize for the Wrong Thing
Five Google Ads setup mistakes still costing advertisers in 2026, from click-to-call tracking errors to location defaults and display network opt-ins.
TL;DR: At least four of these five Google Ads mistakes share the same root cause: they give Google bad data, so Google optimizes for the wrong outcomes. Specific problems include click-to-call events counting one person’s four button taps as four conversions, location targeting defaulting to show your ads to people in other countries, and the display network draining your search budget on bot farms.
| Setting | Correct Setup | Common Mistake |
|---|---|---|
| Call conversion threshold | 60+ second calls only | Any click-to-call event (set to “every”) |
| Location targeting | Presence only | Presence or interest (Google default) |
| Display Network | Separate campaign with its own budget | Opted into Search campaign settings |
| Performance Max data | Offline CRM conversions and appointments | Website form submissions only |
| Ad group structure | Intent-aggregated keywords | One keyword per ad group (SKAG) |
Bad Data, Bad Results: 5 Google Ads Mistakes That Make Google Optimize for the Wrong Thing
The five Google Ads mistakes in this post are not theoretical. They are patterns from the first two weeks of 2026 audits. Some are beginner traps. Some are outdated strategies that experienced advertisers held onto for too long. All of them have the same consequence: Google receives bad data and finds the wrong audiences.
This post is based on a video Peterson published on the Creekside Marketing YouTube channel: Top 5 Google Ad Mistakes 2026.
Mistake 1: Click-to-Call Events Counted as Conversions (Especially Set to “Every”)
The most destructive data error in lead generation accounts is using click-to-call website events as primary conversions, especially when the counting method is set to “every.” This single setting corrupts everything Google learns about your audience.
Here is what actually happens. A visitor lands on your site and taps your call button. Their browser does not support dialing, so nothing happens. They tap again. Still nothing. They tap the button three more times out of frustration. Google records five conversion events from one non-caller. The algorithm sees a two-dollar click that produced four conversions and immediately goes looking for more people who behave the same way.
Those people do not call you.
A specific example from our audit process: you could have 500 people click your call button and receive zero real calls. If Google is optimizing for button clicks, it finds you 500 more people who click and do not call.
The correct setup is calls from ads with a minimum duration threshold. Setting the conversion to count only calls lasting 60 seconds or more means Google records a conversion only when a real person stayed on the phone long enough to have an actual conversation. You cannot fake a 60-second phone call. A bot, an accidental tap, or a browser that cannot dial a number will never produce one.
For lead generation accounts specifically, this single change to your conversion setup is often more impactful than any bidding strategy adjustment.
Mistake 2: Location Targeting Left on “Presence or Interest”
This is Google’s default setting and it works in Google’s favor, not yours.
When location targeting is set to “Presence or interest,” Google will show your ads to anyone, anywhere in the world, who has shown interest in your targeted location. Someone in another country searching for veneer services in California will see your California ad. Google gets paid for the click. You do not get a patient.
The signal this creates is particularly damaging when you use automated bidding. Google sees clicks coming in from locations outside your service area, counts those interactions as positive signals, and starts building an audience model that includes people who are geographically unqualified.
The practical tell is cheap CPCs alongside conversion reports showing traffic from cities you never intended to target. If your campaign analytics show clicks from distant locations, this setting is almost certainly the cause.
The fix takes under a minute. Navigate to your campaign location settings and switch from “Presence or interest” to “Presence: People in or regularly in your targeted locations.” Your CPCs will likely increase because you are now competing only for genuinely local impressions, but every dollar goes to someone who could actually become a customer.
For a detailed walkthrough of this setting, see: How to Set Google Ads Location Targeting Properly.
Mistake 3: Writing Off Performance Max Because of 2023 or 2024 Results
Performance Max earned its bad reputation. In 2023, 2024, and into early 2025, it was genuinely unreliable for most lead generation accounts. Without quality conversion signals, the algorithm defaulted to optimizing for whatever was easiest to measure. That usually meant spam form submissions and low-intent clicks.
But avoiding Performance Max entirely in 2026, based on those experiences, is now a mistake in the opposite direction.
Google’s algorithm has access to significantly more behavioral data today than it did two or three years ago. The expansion of AI Overviews and Gemini search has generated richer intent signals across the search ecosystem. The version of Performance Max that burned accounts in 2023 is not the version running today.
The critical requirement is sending quality conversion data back to Google from outside your website. That means when a form submission arrives in your CRM and your team confirms it is a real, qualified lead, that confirmation event gets sent back to Google as an offline conversion. Better still: track when appointments are actually booked. When Performance Max is told to optimize for booked appointments, it cannot be gamed with bot activity. Bots do not book consultations.
The same accounts that got burned by Performance Max in 2023 because they were tracking website form submissions will see significantly different results in 2026 if they track CRM-confirmed leads or downstream appointment events. The algorithm is the same one, fed better data.
For more on how conversion data quality affects Performance Max behavior, see: The Easiest Way to Stop Performance Max from Wasting Your Google Ads Budget.
Mistake 4: Opting Into the Display Network Inside a Search Campaign
When you create a Search campaign in Google Ads, you will see an option to also show your ads on the Display Network. In some campaign flows this checkbox is on by default. Most advertisers leave it enabled because the option is framed as additional reach at no extra cost.
What it actually does is give Google permission to spend your search budget wherever it is easiest to spend it. The easiest place to spend a search budget is the Display Network, specifically on low-quality publisher sites and apps that contain bot traffic and click farms. Google profits from those placements. You do not receive leads from them.
The pattern this creates looks identical to Performance Max fed bad conversion data: cheap CPCs, high impression volume, and no qualified leads to show for the spend. The low CPCs are not evidence of efficiency. They are evidence that your ads are showing to traffic that will never convert.
The correct approach is to run display advertising through a dedicated Display campaign with its own budget, its own creative assets, and its own performance targets. That structure gives you full visibility and control over what you are spending and whether it is producing results. Opting into the Display Network from within a Search campaign removes both.
For more on blocking non-qualified placements across campaign types, see: Why Your Google Ads Are Showing Up on Mobile Games.
Mistake 5: Single Keyword Ad Groups and Avoiding Broad Match
These two practices are connected. Both were effective strategies in 2021 and 2022. Both are now outdated, and accounts still running them are fighting against Google’s algorithm instead of working with it.
Single keyword ad groups (SKAGs) were built on the premise that maximum keyword segmentation gave you maximum control. Each keyword lived in its own ad group with tightly matched ad copy. No dilution from related search terms, no ambiguity about which ad showed for which query.
The problem today is that SKAGs fragment the conversion data each ad group receives. Google’s bidding algorithm needs a meaningful volume of conversion signals to make reliable decisions about when and how much to bid. Split your conversions across 40 single-keyword ad groups and none of them ever accumulates enough data for the algorithm to learn from. You are also forcing Google into specific auctions it would prefer not to compete in, rather than letting it use behavioral signals to determine when to bid. Aggregating intent-matched keywords into a single ad group gives Google a larger data pool and lets the algorithm dip into an auction when its signals suggest a high-intent user and pull back when they do not.
Broad match avoidance follows from the same burned-in-the-past logic as Performance Max avoidance. Broad match in 2021 would match your ad to completely unrelated queries and waste budget fast. That version reflected the limitations of Google’s data infrastructure at the time.
In 2026, Google has substantially more behavioral data behind every query. The growth of AI Overviews and Gemini search has expanded the volume and specificity of intent signals the algorithm can draw from. When you run broad match with a conversion-focused bidding strategy and quality conversion data, Google can identify users who show strong behavioral signals for your service even if they did not search your exact target keyword. You let Google find the people most likely to convert rather than forcing it to show your ad to every person who uses a specific phrase regardless of what else is known about them.
The practical path: consolidate SKAGs into intent-based ad groups, test broad match alongside exact match in the same groups, and give the setup 4-6 weeks of conversion data before drawing conclusions. The data quality principles from Mistake 1 still apply here. Broad match fed 60-second call conversions behaves very differently from broad match fed click-to-call button events.
Why These Mistakes Keep Showing Up
The common thread across all five mistakes is that they produce metrics that look acceptable in the short term. Click-to-calls show high conversion volume. Location “Presence or interest” shows cheap CPCs. Display Network opt-in shows broad reach. SKAGs show clean segmentation in the reporting interface.
None of those metrics are the actual goal. The goal is qualified leads that become paying customers. Based on $20M+ in managed ad spend across Google Ads accounts, the accounts that consistently reach that goal are the ones that are disciplined about what counts as a conversion and what does not.
Feed Google good data. Let the algorithm find the people most likely to convert. Every other optimization decision is secondary to that.
Frequently Asked Questions
What is the best conversion event to track in Google Ads for service businesses?
The furthest-downstream action you can reliably measure is the best conversion event. For most service businesses that is a CRM-confirmed qualified lead or a booked appointment. At a minimum, track phone calls with a 60-second minimum duration so you are only counting calls where someone was genuinely engaged.
How do you fix the location targeting Presence or Interest problem?
In your campaign settings, find the Location options section and change the setting from “Presence or interest” to “Presence: People in or regularly in your targeted locations.” This single change removes out-of-area traffic from your conversion signals and your bidding audience model.
Is Performance Max worth using for lead generation in 2026?
Yes, if you are sending quality conversion signals from your CRM or booking system. Without offline conversion import or confirmed-lead events, Performance Max optimizes for whatever is easiest to measure on-site, typically spam form submissions. With quality downstream data the results are substantially better than in 2023 through 2025.
What is a single keyword ad group and why is it outdated?
A single keyword ad group (SKAG) puts one keyword per ad group to achieve granular control. The approach fragments conversion data across too many ad groups in accounts where the algorithm needs aggregated signals to make reliable bidding decisions. Intent-based ad groups with multiple related keywords give the algorithm more signal to work from and produce stronger results with today’s bidding systems.
How do you safely test broad match in 2026 without wasting budget?
Run broad match alongside exact match within the same ad group, use a conversion-focused bidding strategy such as Target CPA or Maximize Conversions, and ensure your conversion setup tracks quality events like 60-second calls or CRM-confirmed leads. Review the search terms report weekly for the first month and add negative keywords for any irrelevant query patterns you find.
The Bottom Line
These five mistakes are not just about wasted budget. They are about teaching Google to optimize for the wrong outcomes. Once the algorithm learns from bad conversion signals it compounds that direction. The longer these settings run, the further an account drifts from the results that actually matter.
If you want to know whether any of these issues are active in your Google Ads account right now, we offer a free audit that goes through your setup and identifies exactly what is costing you money.
Request your free $10K Profit Audit
Peterson Rainey is the founder of Creekside Marketing, a paid ads agency managing $20M+ in annual ad spend across Google Ads and Meta Ads. He publishes practical paid advertising content on the Creekside Marketing YouTube channel.
