You have lots of options for Topliners to notify you about changes and updates to content you care about. Changes to content you create and participated in are always tracked in Communications. You can also click "Follow" to bring updates about documents, discussions, and Place activity into your Followed activity stream. Clicking "Track in Communications" for any item pulls activity about that item into your Communication area, where you'll be alerted about it as soon as you log in. (Be sparing about what you track: you don't want important items to be buried in a sea of updates you don't care about.)
To begin following activity, navigate to the area you care about — a space or document or blog or person, for example — and click "Follow" under Actions. The button changes to say "Following." Click it again to stop following.
Whether you get notified by email about stuff you follow is up to you--just click Preferences under your name to decide whether to get email about everything you follow, just Communication items, or some other selection of items.
