Google RankBrain facts summary

    Google RankBrain facts summary

  • 1 It's an artificial intelligence for processing search queries

    Google has developed artificial intelligence called RankBrain to process obscure search queries. An example of such a query is, 'What’s the title of the consumer at the highest level of a food chain' or 'How many tablespoons in a cup?'.


  • 2 It handles around 15% of Google's daily search queries

    It will process around 15% of Google's 3.5 billion daily searches that have not been seen before. Greg Corrado, Google's senior research scientist, said: 'A very large fraction' of search queries had been served by RankBrain over the past few months.

  • 3 It doesn't use the usual search criteria

    RankBrain won't use Google's search algorithms that rank sites based on hundreds of different criteria. See also: The reasons Google search traffic fluctuates wildly.


  • 4 It makes educated guesses

    RankBrain will make 'educated guesses' about what words mean and connect meanings. See also: why are search engines turning into answer engines.

  • 5 It learns from its mistakes

    RankBrain also learns from its mistakes to make future results more accurate. See also: why Google's search algorithm changes often



  • 6 It's an answer to Facebook's strategy

    In late 2015, Facebook revealed it was taking on Google by indexing every single public post made on the site, which currently stands at 2 trillion. The site said its users are already making over 1.5 billion searches per day and it will now start serving personalized results to these users.

  • 7 It outperforms Google's engineers

    During tests, Google engineers who design the algorithms correctly ranked 70% of sites from a range of search terms while RankBrain achieved a score of 80%. 

  • 8 It turns words into vectors

    RankBrain uses AI to turn words into 'vectors' so it can understand them more easily. It then serves the results based on meaning similarity, and it monitors how the person making the searches responds to the results. It then learns and adjusts its filtering process accordingly. 

  • 9 It's the 3rd most important ranking signal

    Of Google's 200 ranking signals, RankBrain is number 3.

  • 10 It learns offline

    All the learning RankBrain does is offline, where it learns from historical searches.