People can be grouped into groups of people, which makes it easier to manage various system functionalities – including access control –, given that both individuals and groups may be included in profiles or assigned to roles.
For details on creating people, see Chapter 2: Organization -> People -> Manage Groups of People or for details on how to integrate an external directory service see Chapter 17: Administration -> Integrations -> Integration Tasks -> Creating a Task to Integrate with an LDAP.