If you want your ticket purchasers to be redirected to a specific page after their purchase, here's how to do this from the dashboard:
First, click Ticketed Events, and then Manage on your event. Next, choose Settings from the left menu
Select Advanced at the top
In the Advanced settings, scroll to Redirect URL field and paste the link to the page you want to redirect ticket buyers to after their purchase. And click Save!
Now when a donor completes their purchase, they will be automatically redirected to the page you linked!