We often think of self-expression as involving speech or writing—putting out thoughts and/or feelings—and perhaps some actions (provided they are creative). People have come up with all sorts of wonderful outlets for self-expression:
It’s true that creative activities are often a great way to express yourself, but don’t forget about the many other ways available to you! In truth, anytime you are behaving in accordance with your true, authentic self and doing anything other than sitting still, you are likely engaging in self-expression.
And there’s another (fairly obvious) way people have started putting themselves on display:
Did you do the >dun-dun-dunnnn< sound effect?
Anywho! Social media is one of the options for expressing ourselves these days.