Here is a list of ways to manage contacts in Teams:

1. Start by adding a contact by searching their name in the contacts tab
2. Create a Contact Group by selecting the + icon and provide it with a name
3. Add contacts to the group from the tabs under the specific Contact Groups
4. Send messages to multiple contacts in the group simply by selecting the group name
5. Retain easy access to conversations conducted within Contact Groups by selecting the drop down arrow
6. Organize and store your contacts by selecting the sort and filter icons