Why your Google Ads budget is going to random apps and websites

Your budget is going to random apps and websites because your Search campaign is opted into Google's Display Network, almost always through a checkbox that was ticked by default when the campaign was built. Google then places your ads inside mobile games, utility apps and unrelated websites, and automated bidding keeps spending there because those clicks cost a fraction of a real search click.

I see this in almost every account I take over. It looks like sabotage on the placements report, but the cause is nearly always a default setting that nobody revisited, and defaults are easy to change once you know where they live.

How does a Search campaign end up showing ads in mobile games?

When a Search campaign is created, the campaign settings include a Networks section with two checkboxes. One opts the campaign into the Display Network, which is Google's inventory of ad slots on third-party websites and inside mobile apps. The other opts it into Search Partners, a collection of non-Google sites that carry Google search results. Both have historically been pre-ticked, so a campaign built quickly, or built by someone clicking through the setup wizard, ships with them on.

The result is that a campaign you think of as "people searching for my service on Google" is also buying banner impressions in puzzle games. The searcher intent you paid Search prices to reach never existed on those placements.

Why does automated bidding pour money into the junk?

Smart bidding optimises toward whatever your conversion action counts, and it degrades badly without clean conversion data. If your conversion tracking is loose, the system can read junk clicks as success. In one account I took over in 2026, the conversion tag fired on page load, so 75% of clicks counted as conversions, and the bidding system treated cheap app traffic as a goldmine. If you have plenty of conversions but no actual enquiries, read why your Google Ads conversions do not match your leads before you judge anything else.

Even with clean tracking, bid strategies that chase click volume will buy the cheapest clicks available, and the cheapest clicks live on Display. The algorithm is doing exactly what it was told. The instruction was wrong.

How do you see the leak in your own account?

You can check this yourself without any technical skill. Open Google Ads, go to Campaigns, and use the segment option to split the table by network. You will see your cost, clicks and conversions divided between Google Search, Search Partners and the Display Network. If a Search campaign shows meaningful Display spend, you have found the leak.

Then look at the placements or "where ads showed" report for the detail. This is where you find the app names and website domains your budget actually bought. Seeing a list of games and obscure foreign sites next to real money is usually the moment clients stop needing convincing.

• The Search campaign is opted into the Display Network · problem

  On by default when a campaign is created quickly. This is the setting that does it.

• Placements include mobile games and parked domains · problem

  Segment by network, then read the placement report.

• Automated bidding is chasing the cheap clicks · problem

  Junk inventory is cheap, so it looks efficient to a bidding system judged on volume.

• Search and Display are reported separately · good

  Blended averages hide the leak. Split them before you judge performance.

This is not exotic. It is one checkbox left on, and it is one of the first things I look for in a takeover.

How do you turn it off?

Open the campaign's settings, find the Networks section, and untick the Display Network checkbox. The change takes effect quickly and costs nothing. Search Partners is a judgement call rather than an automatic cut: segment its numbers first and keep it only if it converts at a cost you accept.

Display advertising itself has legitimate uses, but as its own deliberate campaign type, with its own creative, its own budget and actively managed placement exclusions. A Search campaign bleeding into Display by default gives you Display's weaknesses at Search's expense.

What should you check next?

If the leak was real, your historical results overstated performance, so verify your measurement before trusting any report again. My rule in every takeover is to fix measurement before judging campaigns, and the three receipts explains the evidence a working setup should produce. If an agency built and ran the account, this check belongs alongside the others in how to tell if your ads agency is doing a good job. And if your cost per click has been drifting upward at the same time, the causes overlap: see why your cost per click suddenly went up.

All of this is checkable in one sitting with the access you already have. If the untangling runs deeper than settings, tracking rescue work like this is a fixed-fee job for me, somewhere between R4,500 and R8,000, but most readers can close this particular hole themselves today.