The benefit of having a team is to set a pre-arranged group of users for particular tasks within a workflow.
This is what you need to do to create a Team.
1. Go to Settings > Workflow Settings > Teams, and click Create Team:
2. Enter your Team name along with a description if you prefer.
3. You can tick the default tick box if this is the Team you will always use.
4. The Roles are automatically selected to a pool of users in that named role, but you can change this to a specific user if you prefer.
Once done, click Save.
And you're done!
To test, you can assign a workflow via Create > CRM > Assign Workflow, and you will see the new Team display as per below: