Google RankBrain: The AI Behind Google Search

RankBrain is a machine learning AI that helps optimize and interpret searches on Google. It was introduced in 2015.

It uses search queries, user behavior, and contextual data to better understand search intent and return the most relevant results.

RankBrain is constantly updating itself by analyzing how users interact with search results, making it more accurate over time.

It's estimated to be the 3rd most important ranking factor in Google's search algorithm.

The goal is for RankBrain to move beyond keyword matching to search for concepts and semantic meaning, though some feel search quality has declined.