Upload Your List
Uploads work great if you have a customer group ready you want to turn into a List ready for testing. The “Add List” action on the Audience page will take you to the List page.
When you create a new List, you can use an Upload to add an existing participant group into Helio, or set up a Screener that will gather customers who opt-in for testing. Check out our Help Center article on Uploads to see the full breakdown of how to add participants to your List.
Once you have a List ready on your account, you can use the “Create Test” action next to any list on the Audience page, or select “Your Lists” on the test creation page.