For things, not strings,” as Google described it. Strings means to search only strings of letters, such as pages that match the spelling "Obama." Things mean that instead, Google understands that when someone searches for “Obama,” they are likely to be US President Barack Obama, a real person with connections to other people, places, and things. The Knowledge Graph is a database of facts about things in the world and the relationships between them. That's why you can do a search like "when was
Obama's wife born" and get an answer about Michele Obama like below, without ever using her name: obama wife How does RankBrain help refine queries? The methods Google already uses to refine queries usually come down to a human being somewhere hard fax number list at work, either having created root lists or synonym lists, or making database connections between things. Of course, there is some automation involved. But to a
large extent, it depends on human labor. The problem is that Google processes three billion searches a day. In 2007, Google said that 20-25% of these queries had never been seen before. In 2013, this brought that number down to 15%, which was again used in yesterday's Bloomberg article and reconfirmed by Google. But 15 percent of three billion is still a huge number of queries ever entered by a human searcher – 450 million a day. Among these are complex multi-word