PaRaMeter stands for "Page Rank Meter" - a free Google PageRank checking and monitoring tool. With PaRaMeter, you can easily check the page rank of multiple pages with one click.
PageRank is one of the methods Google uses to determine how relevant and important a page is. PageRank is a "vote", by all other pages on the Web telling Google how important a particular page is. It is one of the parameters of search engine ranking.