Google's SERP poisoning wrecks SEO tools: ahrefs and semrush data diverge wildly during core update
gaganghotra_ · x · 2026-11-11
In his Nov 11 'Core Update Notes', Glenn Gabe warns that Google is poisoning SERPs to thwart AI scrapers and SEO tools, making visibility tracking unreliable. Across 1,000 sites in several verticals, he shows screenshots where ahrefs and semrush report wildly different traffic curves and keyword data for the same site. GSC remains the source of truth 'for now', but doesn't capture the full ranking picture.
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