How Google's Search Algorithm works

How Google's Search Algorithm works:

The story of Google’s algorithm begins with PageRank, the system invented in 1997 by cofounder Larry Page while he was a grad student at Stanford. Page’s now legendary insight was to rate pages based on the number and importance of links that pointed to them — to use the collective intelligence of the Web itself to determine which sites were most relevant. It was a simple and powerful concept, and — as Google quickly became the most successful search engine on the Web — Page and cofounder Sergey Brin credited PageRank as their company’s fundamental innovation.

Google Websearch Process:

Web search is a multipart process:

First, Google crawls the Web to collect the contents of every accessible site. This data is broken down into an index (organized by word, just like the index of a textbook), a way of finding any page based on its content. Every time a user types a query, the index is combed for relevant pages, returning a list that commonly numbers in the hundreds of thousands, or millions. The trickiest part, though, is the ranking process — determining which of those pages belong at the top of the list.

Google’s massive computing power and bandwidth give the company an undeniable edge. Some observers say it’s an advantage that essentially prohibits startups from trying to compete. But Manber says it’s not infrastructure alone that makes Google the leader: “The very, very, very key ingredient in all of this is that we hired the right people.”

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