RankBrain

RankBrain, introduced in 2015, was the first major integration of machine learning and artificial intelligence into Google’s core search algorithm. RankBrain’s primary function is to interpret and process complex, never-before-seen search queries (which account for 15% of all daily searches). Instead of relying on exact keyword matching, RankBrain uses advanced AI to understand the semantic intent behind a ambiguous query and matches it to the most relevant content available. Furthermore, RankBrain continuously analyzes user engagement metrics (like CTR and dwell time) to adjust rankings in real-time, heavily rewarding pages that perfectly satisfy user intent.

RankBrain Simplified

RankBrain is the artificial intelligence system Google uses to understand weird or brand new search questions. It uses machine learning to guess exactly what you mean, and then watches how you interact with the websites it shows you to learn how to do a better job next time.