> ## Documentation Index
> Fetch the complete documentation index at: https://docs.atomcommerce.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Buy X Get Y

> Reward customers with a free or discounted item when they purchase qualifying items.

Buy X Get Y lets you reward one purchase with another product.

## Best Use Cases

* Classic BOGO campaigns
* Attach-rate campaigns (buy item A, discount item B)
* Product-pair promotions (camera + tripod, dress + accessory)

## Common Structures

* Buy one, get one free
* Buy X, get Y percent off
* Buy X, get Y amount off
* Buy X, get Y at fixed price

## Key Controls

* X side: what customers must buy to unlock the deal
* Y side: what item gets discounted
* Discount mode for Y: free, percent off, amount off, fixed price
* Limits: max discount per order, multiple uses per order

## Example

<Callout>
  Buy any sweater, get one scarf free. Sweater unlocks the offer, scarf receives the discount.
</Callout>

## Continue

* Complex qualification and exclusions: [Advanced Buy X Get Y](/offers/types/advanced-buy-x-get-y)
* Offer interactions: [Offer Priority and Stacking](/offers/priority-and-stacking)