When a ticket is created, you can automatically add a tag to it, based on the properties of the ticket. For example, if a premium customer raises a ticket with High priority, you can add the tag 'Important' to those tickets. 

To have this set up, you would have to create a new automation rule under Admin > Workflows > Automations > Ticket creation > New rule:


Match ALL of the below

In Tickets > If Priority > Is any of > Urgent

In Contacts > If Requester name > Is > Saul


Add tag > Important