It shows Goole page rank, Alexa rank, Facebook shares, Twitter shares of any webpages on toolbar.
This extension displays Google page rank, Alexa rank, Google+ shares, Twitter shares, Facebook likes/shares/comment/commentsbox/clicks, ip location for current page. SEO PageRank extension is fast, accurate, and lightweight.
What is Google page rank?
PageRank is Google’s system for ranking web pages. A page with a higher PageRank is deemed more important and is more likely to be listed above a page with a lower PageRank.
What is Alexa rank?
Alexa ranking is a rank of a website according the data from Alexa.com.