4.8.3 Page Rank Video
PROFESSOR: PageRank is a measure of the importance of a web page. But let me immediately correct my own confusion that I suffered from for some time until very recently, which is that even though PageRank is used for ranking pages, it's called PageRank after its discoverer, developer, Larry Page, was one of the co-founders along with Serg Brin of Google. So the motivation is that when you-- at least before Google, when you did a standard retrieval on a web page using keyword Search and similar kinds of criteria, you'd get back millions of hits, most of which were really low quality and you weren't interested in, and with a few useful pages buried in the millions. And the question was, all of these documents are indistinguishable in terms of keyword search and textual patterns, how do you figure out which are the important ones. And the idea that Page came up with was to use the web structure itself, the structure of the worldwide web, to identify the important...