Microsoft Teams is a collaboration application which allows you and your colleagues to stay informed, organized, and connected. It is easy to create a Team and invite members. A Team can be used to help coordinate work for a department, committee, or any other group. Teams provides the ability to share files, host virtual meetings, chat with team members, and coordinate activities. Channels can be used to create work areas within a team, such as topics or sub-committees.
View the document attached to this article for more information on syncing Teams to Explorer for Windows or Finder for Mac using OneDrive.
A good overview video of Teams is at What is Microsoft Teams?
More information on Teams can be found at Overview of teams and channels in Microsoft Teams