A collection is a grouping of products that merchants can create to make their stores easier to browse. For example, a merchant might create a collection for a specific type of product that they sell, such as Footwear. Merchants can create collections by selecting products individually or by defining rules that automatically determine whether products are included.

Shopify stores start with a single collection, called Frontpage. This is a collection of products that are shown on the front page of the online store.

There are two different types of collection:

Custom collections, which contain products that are manually added to a collection by a merchant. For more information, see the CustomCollection resource.
Smart collections, which contain products that are automatically added based on selection conditions that a merchant chooses. For more information, see the SmartCollection resource.

The Collect resource is used to connect a product to a custom collection.