You can automatically email users a request to complete the Satisfaction Survey after their ticket has been resolved for a while.

In Tickets > Satisfaction, you can enable the automated survey and specify the time period you want between the ticket being resolved and the email being sent.

An escalation is used to send the survey request. After you have enabled the satisfaction survey, you will see the escalation in Tickets > Escalations, and you can edit the actions that run if you prefer.

You can view the results of the Satisfaction Surveys by going to Reports > Ticket Satisfaction or by viewing them on the ticket that they were completed on.