> For the complete documentation index, see [llms.txt](https://docs.violet.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.violet.io/prism/catalog/collections.md).

# Collections

{% hint style="warning" %}
The collections sync feature is not enabled by default. If you plan to use it with a Merchant, you can use [this endpoint](/api-reference/merchants/configuration/toggle-merchant-configuration-global-feature-flag.md) to enable collection syncs for that Merchant.
{% endhint %}

Offer collections refer to curated groups or sets of offers that share common characteristics, themes, or purposes. Merchants often create offer collections to enhance the shopping experience for customers and to organize their inventory more effectively. These collections can be based on various criteria, such as product type, seasonality, trends, or specific themes.

Each `Collection` in Violet has a unique Collection ID, which allows for easy identification of individual collections. A `Collection` also has an `ExternalID`, which is the ID assigned by the e-commerce platform.

You can interact with our `Collection` model using our [Catalog APIs](/api-reference/catalog/collections/get-collection-by-id.md).

### Types

There are 2 types of collections:

#### CUSTOM

Manually curated by merchants. The merchant needs to select each offer inside the collection.

#### AUTOMATED

Automatically curated by the platform given a set of rules. The platform is responsible for selecting the offers inside the collection. Eg.: Offers that contain blue in the title.

### Supported Platforms

* Shopify

### Syncing Collections

Once a store is connected and collection sync is enabled, Violet will sync with the Merchant’s collections on a daily basis. This frequency can be adjusted as needed, by request.


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