It is important to note that the Google Toolbar does not always display the latest Pagerank value, as the public data is updated once every 3 to 4 months. By using our Pagerank check tool, you will be able to see the Pagerank that is being reported by several data centers, and hopefully get a more accurate representation of what the current Google Pagerank for a site or page is.
Most websites with less than 100 links will have a PR value between 3 to 5, but also remember that it is not only the number of links which is important, but also the quality of the links. For example, it may be possible to get a PR6, just by having one link from a PR7 or PR8 website. It is a difficult task to achieve a Pagerank higher than 6 without having hundreds of thousands of links or a few links from high PR sites. There are currently less than 150 websites which have a PR10.
Sites with a higher Pagerank will normally have a better Google ranking for keywords appearing on their websites; however, Pagerank is not the only ranking factor. Other factors may include: keywords in title tags, keywords in page content, and keywords in the anchor text of incoming links.
For further reading on Pagerank algorithm see Wikipedia.