"In the few months it has been deployed, RankBrain has become the third-most important signal contributing to the result of a search query, he said."
Do we know what is the most and the second-most important signal?
Do we know what is the most and the second-most important signal?
Do you experience a drastic drop in result quality when you use a public computer?
Or if relevance doesn't count as signal maybe it's social sharing.