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Poisoned SERPs: An update on Google ranking data in Semrush

1 min read
October 27, 2026

Recent industry research and discussion in the SEO community have highlighted changes in how Google responds to some automated search requests. In certain cases, these requests may return results pages that appear normal but differ from what a typical user would see.

This is an industry-wide issue affecting data providers across the SEO space. Industry discussion, including coverage from Search Engine Roundtable, suggests a likely driver is the effort to limit large-scale data collection for AI systems. Google hasn’t commented publicly.

What we’re seeing

Poisoned SERPs generally take two forms. In some cases, the results page as a whole is clearly off, with results that don’t match the query even on page one. In others, the page looks normal at first, but further down the results, it includes pages that only loosely match the search. 

For example, a search in Brazil for a specific baby stroller model returned a dental supply store’s equipment page, because both share the Portuguese word “carrinho.”

What we’re doing

Our systems detect clearly invalid results during collection and exclude them from our database. We’ve also adjusted our data sources based on data quality and added validation checks that flag potentially inaccurate results and collect them again. We continue to refine these processes as search engine behavior evolves.

If you notice something unusual

If you see unexpected ranking changes, especially for keywords unrelated to your pages, compare against your own data, such as Google Search Console. 

Contact our support team with the domain and keywords involved, and we’ll review your data with you.

Looking ahead

Search engines regularly update how their results are displayed and accessed, and we expect that to continue. Our priority is giving customers data they can rely on, and we’ll keep refining how we collect and validate it.

Visibility today spans traditional rankings and AI-generated answers, and we’ll continue investing in both areas because customers need a reliable view of each. We’re committed to helping you understand how your brand and your competitors show up across Google’s results, AI Overviews, and AI platforms like ChatGPT.

We’ll share updates if anything changes for Semrush users.

This statement reflects our understanding as of October 27, 2026, and may be updated as we learn more.

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The Semrush Team brings together AI visibility experts, SEO specialists, data analysts, and product practitioners to help businesses grow and manage their online visibility. We publish research, experiments, and practical guidance grounded in real data from the Semrush platform, covering search, content marketing, and the broader digital marketing landscape.

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