Source: https://oguzerol.com/en/google-ads-mistakes/ Google Ads # Most Common Google Ads Mistakes | Audit Notes [Oğuz Erol](https://oguzerol.com/en/about-me/) | 3 min read | Published: 18 August 2026 ## Quick summary The mistakes I find again and again in accounts I take over: measurement failures, structural problems, setting traps, and the order to fix them. This list is not theoretical: these are the mistakes I meet repeatedly in accounts I take over. The order is not random — it starts with what loses the most money. ## 1. Measurement broke silently The most common and most expensive mistake. Conversion tracking stopped working after a theme or plugin update and nobody noticed. Campaigns run, no warning appears, only the conversion count is low. That drop is usually mistaken for a performance problem and budget gets cut. In reality the ads work and the measurement does not. I start every audit with this check. ## 2. The same conversion counted twice The second most common measurement error. A conversion imported from GA4 and Google Ads’ own tag are both set as primary; one sale appears as two. The result is a picture better than reality. Cost per conversion looks low so budget is raised while real performance stands still. The fix is one source per conversion — detail on the [GA4 link](https://oguzerol.com/en/google-ads-and-ga4-link/) page. ## 3. Page views counted as conversions No real conversion was defined, so page views or time on site were marked as conversions instead. This makes smart bidding hunt the wrong person: it drifts toward people who browse easily and never buy. The algorithm delivers exactly what you asked for. ## 4. The location setting left on default Google’s default location option shows ads to people interested in your area as well as those in it. For local service businesses that is direct waste. Because the option sits in a submenu, most accounts never change it. Detail on the [geographic targeting](https://oguzerol.com/en/geographic-targeting-optimization/) page. ## 5. No negative keyword list The search terms report was never reviewed and the negative list is empty. With broad match in use, a meaningful share of budget goes to irrelevant searches. This is the fastest mistake to fix with the quickest visible effect. I cover the method on the [negative keyword management](https://oguzerol.com/en/negative-keyword-management/) page. ## 6. Everything in one campaign Different services, regions and intents all stuffed into a single campaign. Budget drifts to the most-clicked but least-converting side and nobody notices. ## 7. Brand and non-brand not separated Because brand searches are cheap and convert well, they make the account look better than it is. Without the split, the fact that real growth has stalled goes unseen. ## 8. Limited ads overlooked A disapproved ad is obvious, but ads in “limited” status appear to be running. Part of your reach stays quietly switched off. Detail on the policy violation page. **Want me to look at your account?** I check this list against your account one by one and send the findings in writing. You can reach me from the [contact page](https://oguzerol.com/en/contact/). ## Frequently Asked Questions ### Can I check these myself? Most of them, yes. Testing measurement, reading the search terms report and checking the location setting need no technical knowledge. Enabling [Quality Score](https://oguzerol.com/en/what-is-quality-score/) columns is a few clicks. ### Which fix produces the fastest result? Negative keyword cleanup; the effect usually shows within a few weeks. Fixing measurement is more fundamental, but its effect appears as decisions change. ### My account has most of these. Should I rebuild from scratch? Usually not. Rebuilding loses historical data and learning; fixing the mistakes in order gives better results in most cases. [Back to top ↑](https://oguzerol.com/en/google-ads-mistakes/#icerik) ## You may also find these useful [Negative Keyword Management | Cut the Wasted SpendA real share of Google Ads budget goes to irrelevant searches. How to build a negative list, which match type to use and how often to update it.](https://oguzerol.com/en/negative-keyword-management/)[Google Ads GA4 Link | Without Double CountingLinking GA4 and Google Ads unlocks audience and conversion sharing. Set up wrong, it counts conversions twice. The correct setup and how to check it.](https://oguzerol.com/en/google-ads-and-ga4-link/)[Keyword Optimisation | Google Ads Keyword ManagementIn Google Ads, cutting the wrong keyword matters as much as picking the right one. Match types, search term analysis and negative keyword discipline.](https://oguzerol.com/en/keyword-optimization/) [Browse all articles →](https://oguzerol.com/en/articles/) WHAT YOU CAN ASK FOR ## How do I work? Work-hour packages Tell me about your business and what you need on WhatsApp or by phone; we agree on **a work block of somewhere between 5 and 40 hours** and I start doing what is needed. What you get is not a calendar window — it is net working hours spent directly on your business. I can use 40 hours working three days straight, or deliberately spread it out and finish it over a year — whatever the work calls for. I do not spend my time estimating how long something will take, I spend it doing the work; every hour I spend leaves a lasting result in your business. We keep going for as long as you find it useful. WORK BLOCKS ## Why not monthly? Is 40 hours a week? On a fixed monthly fee both sides are watching the wrong thing: you watch a fixed cost, the other side watches how many more contracts like this they can line up. Working by the hour puts us both in front of the same thing — the real value of the work that got done. I know not having an upfront answer to "how much will this cost in total?" is the natural cost of this model. But instead of paying a fixed fee for months to a setup that is not producing results, you only pay for the qualified time spent on your work — and you see exactly where that time went, start to finish. That is why my clients keep coming back. 5hours300€ + VAT60€ per hour[Choose this block](https://wa.me/905496546489?text=Hi%2C%20I%27d%20like%20info%20about%20the%205-hour%20work%20block.) 10hours500€ + VAT50€ per hour[Choose this block](https://wa.me/905496546489?text=Hi%2C%20I%27d%20like%20info%20about%20the%2010-hour%20work%20block.) 20hours800€ + VAT40€ per hour[Choose this block](https://wa.me/905496546489?text=Hi%2C%20I%27d%20like%20info%20about%20the%2020-hour%20work%20block.) 40hours1,400€ + VAT35€ per hour[Choose this block](https://wa.me/905496546489?text=Hi%2C%20I%27d%20like%20info%20about%20the%2040-hour%20work%20block.)