No products in the cart.
Then follow the screen instructions & after completion you will be redirected to your site.
After connection to Facebook is completed, go to “Product Sync” tab
If you have connected to Facebook successfully, there will be a “Sync Products” button visible
Click on the “Sync Products” button & the vendor store products will be automatically uploaded to Facebook.
Change “Product Sync” settings like “Exclude categories”, “Exclude Tags” according to your need.