As an "owner", you can change a "members" role to an "owner" role.

Members of the team can mention other members in the team in the conversation area by selecting "@" before their name.

Teams features include:

Can you create a video call with an entire team?

In a Microsoft Team, there can only be ONE owner to a team.

Can you delete the Files and Conversation tab?

Where can we change the privacy settings for your team from public to private?

Can you invite an external user to a Teams video meeting?

Teams can be downloaded as a desktop app.