> 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/overview/interact-with-catalogs.md).

# Interact with Catalogs

Catalogs are collections of purchasable Products available on Violet through integrated Merchants. Since multiple Merchants can sell the same product, each Merchant has a Product "Offer". These offers are often call Products in other e-commerce platforms. Each Offer is the parent entity for all of the nested SKUs associated with said Offer. It is the individual SKU, from an Offer, that be bought through your application when integrated with our checkout orchestration process.

In this section, you will take the Merchant Id you retrieved from [View Merchants](/prism/overview/view-merchants.md) and do the following:

1. Retrieve offers available from Merchants and understand what this information means
2. Take a SKU from the product offer and use it in the next section to [Place an Order](/prism/overview/place-an-order.md)


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