The Activity module keeps track of the things people do on your site
and provides mini-feeds of these activities in blocks, in a specialized
table, and via RSS. The module is extensible so that any other module
can integrate with it. The messages that are produced are customizable
via the admin interface and are context sensitive. Some theoretical
example messages include:

• You wrote a comment in response to "example comment title"
• Jim wants to be your friend. Approve this friendship here
• Nancy is Phil's latest fan