To check out all the materials you have added to the marketplace:
Open the Marketplace section and select the Structure tab. Here you can see all of your content items that have been posted to the marketplace.
Click Preview to get an impression of the overall appearance of your Marketplace. The newly opened web page will showcase your online store so you can check to see if customers are having a positive experience on your site.
You can check to see what a course looks like on the marketplace, edit it, or remove it.
