Team segments are a static collection or list of departments, groups & projects. Admins are shown a list of all public and private teams in the domain, where they can narrow down using system or custom team fields to pick the apt list of teams and add them to the segment. Unlisted teams can't be added to a team segment. Teams in a saved team segment will remain fixed until the admin explicitly adds or removes a team. Admins control who can use the team segments (example: only domain admins or domain and intranet admins can use).