If you want to group your tickets with their own respective headings eg. Registration tickets, Workshop tickets, here's how you can do it:
Go to Tickets & Fees
Click on Ticket Groups
Add ticket groups. Click Save.
To add a ticket type to a group, click on Edit icon to edit the ticket details.
Select group from the Group dropdown
Update other ticket types with their respective groups.
Click save.
On the website, the tickets would be grouped under their respective headings. Here's a screenshot from a site:
