In May 2026, Google officially confirmed that llms.txt - a file many SEO practitioners had been recommending for improving AI search visibility - is not used by Google AI Search. The statement came as part of Google's official AI optimization guide published on the Google Search Central Blog. For website owners and SEO specialists worldwide: stop wasting time on llms.txt and invest it in what actually influences AI Overviews.

In April 2026, Google announced a new Spam Policy: Back Button Hijacking - the practice of manipulating browser history to prevent users from navigating back to search results - is now an official policy violation. The grace period ends June 14. Starting June 15, 2026, Google will apply manual actions to violators.

For years, the SEO industry debated whether Google uses behavioral signals - clicks, dwell time, return rates - as ranking factors. In 2024, that question was answered not by a blog post or PR statement, but under oath in a federal courtroom. Google's Navboost system, which uses click and engagement data to influence rankings, was confirmed during the DOJ antitrust trial against Google.

Google launched the May 2026 Core Update on May 20, 2026. Within the first 48 hours, SEO communities were reporting significant ranking shifts globally - across news aggregators, affiliate sites, YMYL niches, and AI-generated content. The rollout is expected to complete by June 3-6, 2026.

Google I/O 2026 (May 19-20) delivered the most significant search redesign since the introduction of Knowledge Graph in 2012. Two announcements stand out for SEO practitioners: AI Agents integrated into Google Search, and the new Intelligent Search Box. These are not UI updates - they represent a structural shift in how users interact with search and how Google delivers answers.