Source Link: https://www.facebook.com/business/help/125074381480892?id=725943027795860
A Facebook catalogue is a container that holds information about all the items you want to advertise or sell across the Facebook family of apps. You can connect your catalogue to different channels to show people your items, including Instagram Shopping, dynamic ads, collection ads, Page shops and more. The tool to manage your catalogues and inventory is Catalogue Manager.
To create your Facebook catalogue:
You’ve created a new catalogue in Catalogue Manager.
Now you can add your inventory. There are several ways to add items to a catalogue. Compare methods to choose the best option for you.