In this video, the speaker introduces viewers to the settings called Ring Groups in Salesmsg. This setting is useful, especially for inboxes with many members. The speaker demonstrates how to access the settings by going to the account settings inboxes and choosing the specific inbox to set up. Once in the settings for that particular inbox, viewers should navigate to the "Calling window" and find the Ring Group line, which is only available if inbound calls are turned on. By pressing "Manage Members," viewers can add or delete any member of the inbox. To receive notifications about incoming calls, viewers can choose up to ten members of the inbox to participate in it.