Typically, the information about an event, list, or team changes through time.
It would be ideal to keep track of these changes through an "updates" feature, and to be able to share these updates through social media, email lists, and other users.
They can help return visitors get up to speed on latest changes quickly.
The workflow should go like this:
Aye, event updates are important.
Event is sold out, so maybe a waiting list opens up.
Event venue changes location days before the scheduled date.
Makes sense due to different factors to have this feature.