You can also click on a user profile in Feeds and view the complete activity stream of the selected user. And you can send a direct message to the user or Chat or Follow the user.

When you are into a projects dashboard, you can filter all the recent project activities based on the activity stream. You can see a list of all the project activities and its collaborators.

What is displayed in the activity stream?
All changes in the project along with their time such as:
You can know what's up with everyone at any time.
Share your feedback, if you have used this feature.
Regards,
Mughil David