You can manage contact list on this tab.
To create list of contacts go to CRM on main menu and click on "Add contact"
Contact's card will be opened with the fields configured in CRM Administration.
Fill in the fields and choose the company from dropdown list to link it with contact. Contacts with no Jira-user are highlighted with ochre color.
First when you open contact's list you'll see list of Jira-users that have access to your cloud instance. Jira-users with no linked contacts are highlighted with rose color.
To create a contact without linked Jira-user click on "Add" in side menu.
To create contact card for Jira-user click on "Sync JIRA Users" in sidebar menu.