I am somewhat confused about the display of a site image when sharing a link from a website to social media such as Facebook.
For a while it seemed to use the site image but probably as I am using different themes, it no longer does.
I have a Site Logo, Site Banner and have tried under the Social Tags to place an image there but when posting a link to FB, it does not display the graphic.
I read elsewhere that the Social tags image should be 1200x630 so can it be less or any different or does it have to be that size precisely? Also, does it matter if they are png or jpg?