With a quick search on the Google FAQ page we found out that the reason to the major drop was that Google PageRank only updates a few times a year, and on that particular occasion something must have happened (such as their tracking code going haywire).
What is Google PageRank?
In short words, it is a tool that calculates the importance of a webpage based on things like how many links the webpage has pointing back to the page. PageRank is the number that Google assign to the website and the websites with higher PageRank numbers are more likely to end up on the top of Google search results. The rank is scored our of 10, with 1 being the lowest and 10 being reserved for the likes of Google, Facebook and YouTube.
Updating Your PageRank
With some further research we found out that you can automate updating of your website’s Google PageRank by adding a
Google PageRank Button/Icon
to it. These add-ins are more trustworthy and frequently updated than relying on Google PageRank alone to find and rate you..
How do I apply for the Google PageRank Button/Icon
You can easily get the Google PageRank Button/Icon
and insert it into you website. If you’re just looking to see your current PageRank though you can enter your website domain name in the white box and click generate, with the details appearing below.
We did a quick search on how our website is ranked and you can see the result: