The Active Directory Helper won't start manually. By default the service is Disabled. The SQL Server Database Engine handles the use of this service.
It publishes SQL Server information in Active Directory. If you don't need to publish SQL Server information in your Active Directory domain, then set the service to Disabled. If you do, set it to Manual and let SQL Server manage it.
The SQL Server installation sets the user account to NT AUTHORITY\NETWORK SERVICE. This will pass the computer name as the credential to Active Directory. Another often used user account is NT AUTHORITY\LOCAL SYSTEM. Following the principal of least privilege, it is best to create a new service account dedicated to the Active Directory Helper service. Domain Users is the only group membership it needs. If you use Group Policy to configure the Log On As A Service privilege then you will need to add this service account to your GPO. If this doesn't apply, then simply setting the user in Services will grant the privilege on your behalf.