Google is expanding its spam policies to explicitly prohibit 'back button hijacking', a deceptive practice where sites interfere with browser back navigation to redirect users to unvisited pages or show unsolicited ads. Starting June 15, 2026, sites engaging in this behavior may face manual spam actions or automated demotions in Google Search results. Site owners are advised to audit their code, libraries, and ad platforms for any scripts that manipulate browser history and remove them before enforcement begins.
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