Best Practices for Office 365 Groups

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Make your group name descriptive so anyone who sees it, knows what it is for. The same acronyms are used by many different departments and organizations on campus, so avoid acronyms or nicknames as much as possible.
Make sure that a group doesn't already exist for the same purpose. Check for similar named accounts, lists or groups by searching in the Search People field in the ribbon in Outlook for Windows or the Find a Contact field in the ribbon on Outlook for Mac.
Don't try to delete tools within the Group that your group won't be using. All groups come with Conversations, Calendar, Files, a Notebook, and more. You may only need the Calendar for your group, but just leave the other components there. If you try to delete one, it will remove the whole group. Just don’t use the component you don’t need.
Keep Group members and owners up to date by adding and removing appropriate people. This helps ensure that only the appropriate people have access to the data contained within the group.
Use the Group Conversations to send email to all group members and keep the conversation in one place. This makes it easy for new members to keep up
Click on this link to Office 365 Groups learning page