When sharing store links on Facebook, product images and details that are included on the link are dependent on the store's Open Graph Meta Tags. Mostly, this should include the page's images, title, URL, and more coming directly from your store. However, there may be times when the information your store is sending is not what's being displayed on Facebook. This may be due to caching on Facebook or your browser or other reasons. Fortunately, Facebook provides a tool that lets you see exactly what the OG information being received is.
Log into your Facebook account and
Once there, Enter the URL of the page where you'd like to see Open Graph Information.
The Debug Tool will then show all of the Open Graph Meta Tags being translated for the page and will provide insight into why the proper image may not display.