Besides PageRank, Google's original tool for organizing search results quickly and accurately, the search giant has a new, artificial intelligence-powered search technology that's becoming increasingly important for Google: RankBrain, Engadget reports.

It's basically the company's solution for interpreting the some 15% of daily search queries that it's never seen before.

RankBrain works by transforming words into "vectors," or mathematical entities, which Google's search engine can use to find similar words or phrases. Over the past few months, RankBrain has become the third-most important signal for display search results, out of "hundreds" of signals currently in play, Google senior research scientist Greg Corrado said. It's also even better at sorting relevant search results than Google's own search engineers.

"The other [search] signals, they're all based on discoveries and insights that people in information retrieval have had, but there's no learning," Corrado said. That's really the appeal of all AI-driven technologies these days, so don't be surprised if you start hearing about similar solutions from competitors.