OrganizerStudio 

Advertising feature is the last block you can see on the Event Home of the Studio.

While clicking on "Add an ad", you will be able to manage the targeted groups and redirection link.

You can add several ads, which will be displayed randomly while refreshing the web app or navigating through the event.

Here's how it looks like ⤵️

On the mobile app, the ad appears as a popup before the Event Home is displayed.