When creating a listing to Etsy, a description is required. This description cannot be an HTML description as HTML is not supported through Etsy's API.
To enter a text description for Etsy:
1. Navigate to Inventory -> Inventory Management
2. Click into a product SKU using the binoculars icon
3. Choose the 'Listing Attributes tab' and choose Etsy from the storefront dropdown.
4. Here is where you can click 'edit' for the description and enter your description for Etsy.