A team is a member in its own right — it has a status, profile fields and its own results — into which individual members are assigned. Teams are how team contests are run: the team is what registers, submits and appears on the scoreboard, while the people in it sign in with their own accounts.
Teams have their own tab at Members → Teams. They don't appear in the members list, which lists everyone except teams.
Two columns, Team name and Status, and four filters: ID, Name, Active and Official. Add team asks only for a name and opens the new team.
The row menu offers Enable, Disable and Delete — the same operations, with the same meaning, as for any other member. See Disable, restrict and remove a member.
Members — the roster, with each member's status. Add member picks an individual member; Remove from team clears the assignment.
Profile — your space's profile fields, filled in for the team.
Controls — Status, Unofficial, and Delete team ("Erase the team and all data").
Teams cannot be nested: Add member offers individual members only.
A member belongs to at most one team. Assigning someone to a second team moves them out of the first, so there's no "remove them from the old one first" step and no way to have somebody compete for two teams at once.
The assignment lives on the member, not on the team. Deleting a team therefore leaves its members in the space, unassigned; it removes the team and its own results, not the people.
Teams consume no seat — only users do. A hundred teams cost nothing against your seat allowance; the people in them cost what they always did. See Quotas and limits.
Running a contest in team mode is a plan feature. Without it, the Teams tab is still there and teams still work as member records, but contests can't be run in team mode.
A group labels members so you can find them; a team replaces them as the competing entity. Adding a group to a contest enters each of its members individually. Adding a team enters the team, and its members' submissions count for the team.