The Set Social tab lets you set description and an image for each of the channels on your KBucket page. These descriptions and images are used when you share your pages on various social media channels.
This is different than sharing individual links. When you share links the information is taken from the actual article.
Set Social lets you promote each of your channels separately. You can also select tags and share your page with the selected tag. The description and image however will be for the entire channel as defined on this page.