PageRank (PR) is about how Google determines the value of website. Google calculates it through a formula that gives all links on a webpage a share of that page’s PR. The PageRank that is sent from one page, or site, to another increases the rank of the page that is linked to.
Therefor the main page of a website normally has the highest rank because all the pages of the site link back to the home page. The website uses its internal link structure to send the link juice to the other pages in the website. Google juice or Link juice are common terms that people have coined to refer to page rank and the distribution of page rank throughout the Internet.
PageRank helps a site by increasing the perceived value of the site in the concern of Google. Although other search engines do not use Google’s PageRank, the others also use incoming links to determine the value of a site.
Webmasters can find out what their PR is by using many free online PageRank tools, a Google Toolbar rank widget or downloading the FireFox PageRank tool or somewhat tool. There is no reason to pay for any page rank checker. There are so many free tools that it is unnecessary for most webmasters.
