To set up campaign for Moments and to understand the best practice when setting up campaign, below links should help you.
Understand campaign: https://developer.amazon.com/docs/moments-ug/get-started.html
Best practice: https://developer.amazon.com/docs/moments-ug/overview.html#best-practices-for-starting-your-first-campaign
Create campaign: https://developer.amazon.com/docs/moments-ug/create-campaign.html
