it is not required to add or join a team. If you are using Trello by yourself with a limited number of boards, you can keep the boards in your personal boards.
If you however have multiple boards and collaborate with different users, it may be helpful to create a team. More information is here: http://help.trello.com/article/927-what-are-teams
You’re invited to our first ever Trello User Groups Good news for current and aspiring Trello enthusiasts! We’re launching Trello User Groups so that you can network, share ideas, solve ...
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