To add products to your Facebook Catalog, just follow these steps:

1 - Go to https://business.facebook.com/commerce/catalogs/ and select "Items" on the left side of your screen:

2 - Then, at the top right of the screen, click on "Add items" and choose between "Add multiple items" or "Add on item":

3 - When choosing the first option, click on "Manual" and then add the list of products you want to include, clicking on "New item":

4 - When choosing the second option, a box will appear in which you can add a title to the product, its description, image, link to your website, currency and price of the product, as well as its condition:

5 - Press "Finish" and that's it! Your product will be added to your catalog and you can now use it within Zenvia Conversion.