Where Are Opengraph Tags Stored?

I'm trying to change the thumbnail image that is displayed when providing my link to my page when posting on Facebook.

I've entered what I thought was the correct code in to the CODE section which includes meta tags for the image I want displayed. The image exists on my site, but just in the Misc. Images & Files section. I grabbed the image location from Get Links / Codes link underneath the filename.



When I run my link through the Facebook debugger, I get a bunch of errors :

Inferred Property
The 'og:image' property should be explicitly provided, even if a value can be inferred from other tags.

Missing Properties
The following required properties are missing: og:image

Invalid App ID
The specified 'fb:app:id' property is not a valid app ID.

The debugger then goes on to show scrape info and then constructs OG properties based on "Raw Tags" found...

Page is : http://www.tomdugganphoto.com

The thumbnail that displays is the image in the footer section (PPA logo)

I'm at a loss.

Edited by

For the photo shown when the home page is shared, go to Site Content -> Manage Home Page, click the preview photo tab and upload the photo you want shown there.

After that, you will need to go here and enter in your URL and have it scrapped again
https://developers.facebook.com/tools/debug/

To get a Facebook APP id, see this:
https://www.picturespro.com/sytist-manual/settings/share-facebook/

Edited by

Thank you.

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