Ads appearing everywhere suddenly on my store

Shopify Discussion
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Topic summary

Sudden appearance of ads across a Shopify store, with no recent app installs or code changes reported by the owner. Others visiting the site could not reproduce the ads, suggesting a device-, browser-, or account-specific cause.

Latest guidance focused on diagnostics:

  • Provide a full-window screenshot of the ads.
  • Check if the same ads appear consistently, and on both mobile and desktop.
  • Test from other devices/browsers to rule out local issues.

Likely cause identified: leftover Google AdSense or Google Ads-related code embedded in the theme or from previously installed apps. Recommended actions:

  • Search and remove any AdSense snippets from theme files.
  • Review previously used Google Ads-related apps and contact their developers to remove residual code.

A second merchant reported the same issue after uninstalling “Simprosys Google Shopping Feed,” saw AdSense ads, temporarily hid them via CSS, and then contacted the app developer to remove leftover code—supporting the residual-code hypothesis.

Open items:

  • Original poster has not confirmed resolution or provided screenshots.
  • Another user asked where to place code in the theme, indicating removal/implementation steps remain unclear. The thread remains unresolved.
Summarized with AI on December 24. AI used: gpt-5.
5

Hello guys.

I am having the same issue in my store. I uninstalled Simprosys Google Shopping Feed in August, and I checked my site on the 13th, and there were all kinds of Google Adsense ads. I had a developer hide it using CSS. He said it was an app, and they would have to remove each app one at a time to isolate what was doing it. Unfortunately, I just read your response to another Shopify store owner having the same issue. I just contacted the app developer to check for any remaining code.

Thanks,

Don