Add this code into your "Head includes" tab under "Site":

<div style="display:none;"> <img src="IMAGE URL HERE" alt="ALT TEXT HERE"></div>

Suggestion from: 
Lindsay Dow

I was able to use an image saved to my main Wordpress domain too. Not sure if there's a way to get the Meta Tags for 'Product Pin' set for each course though. That bit didn't seem to make a difference when I tested it on Pinterest.

Hope that helps if you hadn't already sorted it! smile emoticon

Ahh! I think I've done it! If you add a 'head' html tag in the description on your course site 'information' page, then copy and paste the meta tag info listed here: and edit as needed for your product that *should* enable rich pins for your shop site. Hooray! I'm yet to see it though as it takes some time I think but Pinterest has validated it.

This link has more info too: