What is it?
When someone shares a sign-up/login URL for a cloud provider on social media post, then a specified image is shown in the post.
There is set up a following default image for all provider.
How to change/customise social media image?
Cloud provider must send correctly formatted image file through support requests to Warren for processing.
The recommended size for this image is 1200:630 px and extra information on formatting can be found in this post.