My company has switched to Service Now (SNOW) from another ticket system that had ticket pages show the title of the ticket, to make it FAR easier to find tickets in browser history without remembering the ticket number which no-one in the Helpdesk team can do, especially for tickets many days/weeks old.
This page seems to be talking about ticket templates, not ticket view – https://www.servicenow.com/docs/r/platform-user-interface/service-portal/add-page-title.html