Where do you change the link associated with the social share button?

This is a simple questions however I haven’t been able to find it addressed anywhere on the forum. I just noticed one of the links to my social media account on the floating side bar is incorrect. I tried to locate where to change the link but can’t find it. I’ve gone to Setting > Appearance and find links to change the image associated with each button but not the directing link associated. Can anyone help? Thanks in advance…