Profile in Miro is your email address that all teams you set up or get invited to are attached. A Miro user can be a member of multiple teams.
A team is a space where team members can create and store their boards and projects.
To switch between the teams that you have access to, go to Miro dashboard and click the team icons on the left sidebar.
Switch between your teams on the left sidebar on your dashboard
As soon as you join or create an additional team, a new icon appears on the sidebar.
When you upgrade a team, paid features get unlocked on boards stored in this particular team for all the team members. Please note that the subscription is linked to the team and not to your profile. It means that your other teams may still be on Free plan.