Google toolbar Sidewiki
is browser enabled tool where we can read and contribute comments about a webapage. It is another contribution of google ,launched in Sep 2009.It is available in internet explorer,firefox as toolbar,but in the case of Safari it is available as a bookmarklet.After installing ,we can use the tool. Sidewiki allows users to interact with the website,Here we can share the comments and can post a link to a blog item throgh FaceBook,Twitter,mail, etc.Only the Google tool bar users can view it.
These comments will be displayed on user account.It is a special interface on left hand side of the screen enabled by the toolbar. Google is proposing to use an algorithm to rank comments based on quality and the relevancy of it.A recursive algorithm can analyse the past comments using reader votes on the usefulness.Google plans to work on an API,that will allow developers to use in other places.