RankBrain uses artificial intelligence to embed vast amounts of written language into mathematical entities — called vectors — that the computer can understand. If RankBrain sees a word or phrase it isn’t familiar with, the machine can make a guess as to what words or phrases might have a similar meaning and filter the result accordingly, making it more effective at handling never-before-seen search queries. […]
The system helps Mountain View, California-based Google deal with the 15 percent of queries a day it gets which its systems have never seen before, he said. For example, it’s adept at dealing with ambiguous queries, like, “What’s the title of the consumer at the highest level of a food chain?” And RankBrain’s usage of AI means it works differently than the other technologies in the search engine.
“The other signals, they’re all based on discoveries and insights that people in information retrieval have had, but there’s no learning,” Corrado said. […]
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.
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