Google uses ranking algorithms to determine comment relevancy and usefulness using criteria such as users voting up and down a comment and past contributions. Google Sidewiki was launched on September 23, 2009, allowing users to make comments, which are visible to the public, on any web page. Google Toolbar is often distributed through product bundling with a primary download. It has tools such as AutoLink, AutoFill, Translation, spell checker common to all browsers, while pop-up blocker and word finder are restricted to Internet Explorer.
Users can log into their Gmail accounts and access their email, saved bookmarks, and web history.
Google Toolbar resides above the browser's tab bar and provides a search box to carry out web searches.
