Definitely those profile pictures. You don't want to have one with you in a group where someone is going to look at it and go ok which one is it. You don't want to have one from your high school/all-star years were you are now 35 and 40 and you don't look the same. You definitely want to make sure that it is you. Also your headline. It's that quick snap this is who I am in a nut shell. It does not have to be so robotic though. I see a lot of them that are like, I have my masters degree in this, its all of these credentials. Don't worry about that they will get your credentials later. Tell them what you do with those credentials.