MerchDesk builds and maintains three kinds of collection: bestsellers ranked by units sold or revenue over a rolling window you choose, trending products based on recent sales velocity, and new arrivals that age out automatically after a set number of days. Collections are rebuilt daily. Draft, archived and unpublished products are left out, along with anything you exclude by tag, type, vendor or collection, and the next-ranked products take their place, so a collection of twenty holds twenty.

• Bestseller collections built from recent units sold or revenue.
• Trending collections ranked by recent change in sales.
• New arrival collections that age products out on their own.
• Exclude products by tag, type, vendor, or membership of another collection.
• Choose whether the app sets product order or you keep your own.