This module lets you set a default Open Graph image for your Drupal site. It integrates with Metatag to dynamically add the uploaded image's URL to your Open Graph meta tags.
The OG Default Image module allows you to upload a default Open Graph (OG) image for your Drupal site. It integrates with the Metatag module, enabling the use of a token to dynamically insert the uploaded image URL into your Open Graph meta tags.
How to Use
Install the module.
Go to /admin/config/search/metatag, there you will see a new tab "Default OG Image".
On the Default OG Image configuration page, upload your image.
(Recommended dimensions are 1200x630px.)
Use the token [og_default_image:og_default_image] in the Open Graph image URL field of the Metatag settings.