I learned something new and amusing today about the SEO term called PR or Page Rank that you can use to win bar bets with. (no guarantees of course)  I always knew it was different than the term SERP rank which stands for Search Engine Results Page rank which means are you #1, #2 or #3 … in the search results.  Most people call this Page Rank.  However Page Rank has always meant the relative authority/importance of a particular page or website based on a Google algorithm that weighs things like number and importance of other websites that link to the page or domain and other factors.  What I learned today that was new and amusing was that Page Rank was named after Larry Page who cofounded Google and who came up with the concept of the Page Rank approach.