After your application to the Ticketmaster affiliate program is approved, you will gain access to affiliate links, banners, and widgets that can be used for promotion. The next thing to do is place your affiliate link or promo tools on your website, landing page, email newsletter, etc. and start driving traffic there to get rewarded for every sale made through your tools.
Make sure that you create enough context and explain the benefits of buying tickets with Ticketmaster to your audience. For instance, you can say that it is a leading ticket marketplace for events worldwide that guarantees secure payments.
In addition, carefully study the terms of the program for your country and only use the allowed traffic types to avoid having your commission suspended.