It's called RankBrain and is now a powerful signal being used by Google in ranking search results.
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A machine-learning AI is handling a large fraction of Google's search queries.
Move over, Google search algorithm hand-crafted by hard-working Google engineers. RankBrain has moved in, a machine-learning artificial intelligence that Google?s been using to process a ?very large fraction? of search results per day.
It?s not really a complete replacement of the Google search algorithm, also known as Hummingbird, however. The algorithm is the system that processes what people search for and combs through billions of pages to rank the ones believed to be best first.
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Meet RankBrain: The Artificial Intelligence That's Now Processing Google Search Results