“Any time you type in a keyword, as Google we have gone out and crawled and stored copies of billions of [websites’] pages in our index. And we take the keyword and match it against their pages and rank them based on over 200 signals — things like relevance, freshness, popularity, how other people are using it,” Pichai said after Rep. Zoe Lofgren (D-Calif.) sarcastically asked about the “little man behind the curtain.”