What is PageRank and why should I use it?
PageRank is a link analysis algorithm developed by Google, Inc. It is used to measure the amount of links a page has to determine it's relative importance. The higher the PageRank a URL has, the higher it's authority is with Google.
PageRank is one of the few factors that webmasters can use to determine the strength of a web page. If a website has a high PageRank, chances are it has a large amount of strong inbound links to fuel it, and Google has ranked the site appropriately.
Why should you use it? Google lets you check public PageRank data to see how much trust they have placed in a website. Webmasters often use PageRank to see how their website's link authority is growing. PageRank is updated every 3-6 months at Google's discretion, and therefore should not be used as a definitive way to judge the trust of a website; it only gives us an idea of the website's authority and link power based on Google's algorithm.
What is different about this PageRank checker?
Our PageRank checker is powered by AJAX, a programming technology used to load javascript asynchronously. This translates to PageRank lookups can be done automatically without interfering with the display of your current page. Simply type in your URLs into the form and our application will do the rest.
We have also elminated the need for captchas, making your lookups much faster and less frustrating.
How often is Google PageRank updated?
Google doesn't seem to have a predictable pattern for updates; all public toolbar updates are made at their discretion. Typically, the time between updates is 3-6 months, with the longest delay inbetween updates being 9 months. The last PageRank update was on November 7th, 2011 (last checked February 3rd, 2012)