Team Owners have the ability to delete messages/conversations (both terms may be used) in their Team site.

This may be used to remove things such as an accidental message, an incorrect message, or something deemed inappropriate.

To remove a message/conversation:

1. Place your mouse cursor on the message you'd like to remove
2. A small menu bar will pop up
3. Click on the 3 ellipses
   1. 
4. Click Delete
   1.