One of the new things you'll notice with bbPress is the different places where you will see Tags. Primarily you will notice the Tag 'lists' in the sidebar area and the text box area under where you enter in your post.
First to explain for those not familiar with the idea of what Tags are for. This comes from the blogging world where tags are a way to group posts with similar ideas or information. By adding a tag, or tags, to a post you are creating a way to easily find similar topics.
The same idea can apply in forums as well. For example this post could have the tags: tags, search, conversation. Now as other people write posts that relate to Tags that can add the the same or similar tags to their post. This way when someone click on the 'Tags' item in the tag cloud in the sidebar all the posts with that tag will be displayed.
It takes a while to get use to using tags, and no you don't have to add them to your posts, but they can be very handy as they are used over time.
WinExtra / Shooting at Bubbles / Braincell Soup
