In order to edit your team profile, visit your team workspace by clicking on your team icon on the left hand panel.
From the Team Workspace, click on the Gear icon under the Team Name to make changes to the team profile or team membership.
Hover over the team image or section you would like to edit. You can change your Team Name, Tagline, and Image. All changes will save automatically after you click out of the section.
Before making any drastic changes to the team profile, make sure the rest of your team is onboard.