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Google RankBrain
A major Google algorithm change officially introduced in October 2015, although it had been in testing for months before this. With RankBrain, Google added machine learning to its algorithm and has been called the third most important ranking signal.
In June 2016, it was revealed that RankBrain has been involved in every query and has an impact on rankings.
FAQ
Why is RankBrain important?
This algorithm change is important because it was when Google included machine learning to its algorithm.
Why do you need to optimize for RanBrain?
It’s important to optimize for RankBrain since it is the third most important ranking signal.