The process for creating an External test has a couple of things that differ from the Internal one. First, you will have to submit your app for review to Apple before it is approved for the External beta. When you click on the Add Build to Test button for an External test, you will see the following prompt to fill out more details about the app:
This is for specifying to your users exactly what parts of the app they should be testing, along with a description for them to read. You will also need to provide an e-mail they can send feedback to, along with a marketing URL for your app.
You will then ...
