Understanding Social Images for Tightknit Design Work

Hi there, we are working on design work for Tightknit and I'm struggling with where the social image is used that is added to general. I just added it and then awarded myself the tipalti team award but it shows up like this and doesn't use the image I uploaded as the social image to general. What exactly is the social image used for and how can I see an example of what members would receive using the social image?