Depending on which information are you waiting for, you may need to keep updated with a particular discussion or a relevant user.
If this is your case, you have the possibility to follow a Thread or a User. Here's how to proceed.
Subscribe to a Thread:
Note: if you create a thread, its subscription will be automatic. You can however Unsuscribe if no longer interested, by following the same procedure reported above.
Follow a user:
Note: to unfollow this user, simply do the same procedure and click on Unfollow User.