The purpose of teams in OpsCompass is to get the right information in front of the right people.
Assigning users to a team allows the users to focus on just the alerts that are important to them.
For example, say you are assigned to the cost team then you will only see alerts regarding cost and only be able to baseline those specific cost changes. This is a completely separate baseline from say the security team, who would keep their own unique security baseline.
You can be on more than one team if you are in a position where you need to see multiple or all alerts.