The picture of the toolbar you see above is called the Alexa Toolbar. I have it installed on my computers in my Firefox web browser. Very simply, it allows you to see a site's Alexa ranking which basically shows how popular a website is. It's a very handy tool when you deal with SEO. It allows me to keep tabs on where my sites and other sites are ranked. The pic above is of Blogspot, the 7th most popular website. Where do my sites rank, well not #7, but I'm working on it.