In SharePoint 2010, Activity feeds give SharePoint users the ability to know what their colleagues are doing. A user will track only those colleagues that they are interested in following, which reduces the organization noise.
You can also receive updates in the Newsfeed of your My Site when your colleagues add tags to documents and pages. Also, if you are following a keyword as an interest, you can receive an update when anyone applies that tag to content that you have permission to view.
Every update that occurs is configurable by the user. In this way, users see only those things that they are interested in. In this recipe, we will see where to make these updates.
You must have a My Site set up.