Before you report an unconfirmed Google update or panic over a major drop in your rank tracker: check if you were served a poisoned SERP. An interesting new study from @nozzleio looked at 27.5M SERPs across 49 countries and found Google has started actively poisoning results served to scrapers. Instead of blocking requests with 429s or CAPTCHAs (which just tells scrapers to rotate IPs and retry), Google serves a fully rendered, completely normal-looking SERP. What this is resulting in is that the organic results are quietly swapped out with irrelevant data. Some key observations from the study: • 8% of all SERPs were poisoned post-Sept 13 (peaking at ~27% between Sept 27–29) • Organic results kept only ~21% of their usual sites (vs. 88% normal) • Tracked client sites fell out of the top 10 on 58.6% of poisoned SERPs • Social sites like Reddit (+8 pts), Facebook (+5.5 pts), and LinkedIn surged to fill the gaps • Interestingly, paid modules (Ads and Shopping) remained almost completely intact, while AI Overviews and PAA dropped significantly • Desktop pagination was heavily truncated (stopping at page 4 or earlier on deep queries) This is essentially Google's countermeasure against automated AI scrapers and RAG grounding pipelines, but rank trackers are inevitably being impacted. If your client's ranking report shows a significant decline overnight, check GSC average position first. If GSC hasn't displayed a major deviation, it is likely that it is a data anomaly rather than a change in your ranking Read the full write-up and data: nozzle.io/research/poisoned-…