Google Groups allow you to communicate with colleagues, by sharing a common email address that can be used for emails and document sharing. 

Create a Google Group

To create a new Google Group:

The group will be created and a summary of members will be shown on screen. Click on Go to group to view the group. 

Enable Collaborative Inbox features in a Google Group

Once you have created a standard Google Group using the above instructions, you will need to enable Collaborative Inbox features as follows: