Many other web services tell something about a site. Google shows you pages and link information. Alexa gives traffic rankings. Technorati gives link information by freshness and authority. So if you’ve got some questions on how credible or visited a site is, you may want to access these information.
Here’s a neat add-on that gives you a one-click access to these web services – About This Site. Once installed, an About This Site option will appear in your right-click menu.