Everybody uses social media differently, and everybody has different political beliefs, and everyone has different degrees to which they like to share their political beliefs on social media. Celebrities are no different.
Mostly, I don't pay a lot of attention to what celebrities do or say politically. If they're musicians, I care about their music; if they're actors, I care about their movies or television work. What I've noticed is that if they're in the public eye for doing or saying something I agree with, I think to myself "that's cool" and move on without giving it another thought. When they do something I don't agree with, I sometimes think "I wish they'd keep their politics to themselves." I don't actually care that much, but it sticks out more if it's something you disagree with.
Like if George Clooney is in the news for helping starving children in Africa (or was that Brad Pitt?), I think "Cool, use your celebrity status to shine some light on something." If Ted Nugent plays at an NRA benefit for a bunch of Trumpers wearing MAGA hats and starts blabbing into the microphone, I think "Shut the fuck up, Ted. Stick to playing guitar."