What is google page rank ?

Question

what is google pagerank and what is the equivalent of it?

Answer 1

Google Page Rank is a numeric value that represents how important a page is on the web. Google figures that when one page links to another page, it is effectively casting a vote for the other page. The more votes that are cast for a page, the more important the page must be. Also, the importance of the page that is casting the vote determines how important the vote itself is. Google calculates a page's importance from the votes cast for it. How important each vote is is taken into account when a page's PageRank is calculated.

Page Rank is Google's way of deciding a page's importance. It matters because it is one of the factors that determines a page's ranking in the search results. It isn't the only factor that Google uses to rank pages, but it is an important one.

Note : Not all links are counted by Google. For instance, they filter out links from known link farms. Some links can cause a site to be penalized by Google.