Context Panel

The Context Panel on the righthand sidebar is the home for all context on a message that's not found in the message itself. 

There are 3 separate tabs within the Context Panel: Activity Panel, Tags Panel, and Apps Panel.

Activity

Where you can see a timeline of actions and enabling you to Comment on the message with other colleagues or collaborators.

Tags

So you can Tag the message to ensure your Messages are organised and that the right people are Followers of the message.

Apps

Gain fast access to your integrated apps to help enrich your messages with the context of your other app enabling you to work from one place.