How to change the preview image of website social sharing links?
To change the website's social media sharing links preview:
Log in as an admin
Go to domain settings: www.yourwebsite.com/exec/manager/domain/1
Find a Social media image field
Upload an image that you would like to be displayed by sharing the website’s link
Update domain settings:
The recommended size for Facebook and Twitter sharing would be 1200 x 630.