I prefer both because.......... Google PageRank (PR): - There are two types of Google PR, “toolbar PR†and the actual PR that is given to each site. Actually, they are not two different “types†of PR, let me explain…The Google Toolbar PR is what we see in the Google Toolbar, if you have it installed and enabled, that shows a reading of that particular pages rank, as seen by Google. This is supposedly a reading of the actual PR and it’s updated roughly every 3 months or so. (Updates normally take place every 2 to 4 months.) However, it isn’t an accurate reading of a sites authority on a page by page basis in most cases, although it can be useful when looking at the average toolbar pagerank of a range of pages! and ........... Alexa Traffic Ranking: - This is the ranking that is provided by Alexa.com. This is based on the actual traffic going to a Website whereas Google PR is calculated mainly by the number and quality of inbound links to a specific page and not traffic.