When an agent is working on a ticket, he can turn on time tracking feature to track how much time he has spent on this ticket.
Agent also can click the time field and edit the time value directly:
Or modify the value later:
Ticket’s properties shows the total time spent for this ticket:
And we can also create a time report to show the total time an agent has spent, or the total time spent on an organization.
Report chart for an agent: