https://support.office.com/en-us/article/Unite-your-team-with-Groups-in-Outlook-aef27003-2ce6-4c62-ad6c-d5fc472507cf

Do you need to organize and work with a team on a project? In this tutorial, learn how to use Office 365 Groups to find and share information using conversations, share and collaborate on team files, share milestones and schedules on the team calendar, add and assign team tasks using Microsoft Planner, and add new members to your group so they can get caught up with the team.