Multi Product
The Multi Product node is used to present items to customers from a catalogue you've set up in Facebook Business Manager. Customers can then add selected items to a cart and submit the order to your business.
You can display up to a maximum of 30 products from your catalogue to the customer at a time (a limitation enforced by Meta). You can use the Multi-Product node multiple times in a flow, as long as all the products they refer to are from the same catalogue.
Linking a product catalogue to Chat Flow
- Set up your catalogue in the Facebook Business Manager Commerce Platform and upload the inventory to the catalogue. 
- Add a Multi Product node to your workflow at the desired place. 
- Add the Catalogue ID to the node. - This ID is created when you add the catalogue to Facebook Business Manager. 
 
- Add Product IDs to reference the specific products from the catalogue. This can be added in two different ways: - Dynamic: The flow-builder can use an API call to fetch the product IDs from your management system before using the Multi-Product node and use these IDs as variables in Chat Flow 
- Predefined: The flow-builder can manually add the product IDs to the node (i.e., "hard-coded"). 
 

The images below indicate how a catalogue is presented to the end-user in WhatsApp.

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