In order to make your apps compliant with IAB app-ads.txt initiative, you will have to set your developer website on your iOS account.
It is crucial since your website is where you should store your app-ads.txt file which will be crawled by DSPs crawlers to find your authorized digital sellers.
Below are the steps to update your app developer website on your Apple developer account:
1. Sign in to your iTunes account.
2. Click on App store.
3. choose the app that you want to connect your app developer website to.
4. insert your app developer domain in marketing URL (yellow box)
5. Save.
* please notice that comparing to your google play account, on iOS you can't set a app developer website on the account level, so you will have to make this update for each one of your apps.
