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

# UpsellPageProductSource

> How an upsell page picks a product to offer.

| Value | Description |
| - | - |
| `COLLECTION` | A product from the collection named by `collectionId`. |
| `MANUAL` | The product named by `productId`. |
| `REDO_AI` | A product Redo's model recommends for the order. |
| `SHOPIFY_RECOMMENDATION` | A product Shopify recommends for the order. |


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