One of the difficulties of a CRM is to keep track of the topics of interests of each contact, and update the record accordingly.

One way of identifying what topics are important for a user is to see what they write or comment about. If you write into my "cooking" forum, that's likely you are interested by... "cooking".

This module automatically create a tag in civicrm for each forum, and everytime someone post a topic or a reply, her corresponding contact is tagged with the name of the forum

For those familiar with the module that sync og and groups, that's quite similar but for taxonomy and tags

Xavier