Not that I poast my art online very often anyway, but when I do, I just poast 'em to Instagram and here on NG of course

Pixiv and Tumblr are the other two sites I actually use.

I have a barebones website for archival purposes.

Reddit for advertising purposes.

I don't use instagram because I don't really like dealing with a hostile algorithm in addition to clout chasing teenagers.

I don't use twitter because I don't really feel like dealing with terminally online unironic psychopaths.

Newgrounds, twitter and sometimes on some discord servers rlly if it counts. Prolly more places looking to just expand following and having fun doing my stuff rlly.