What is the meaning of 屏幕前的你?
屏幕前的你
Split it like this: 屏幕 前 的 你
屏幕：Screen
前：before

屏幕前 means &quot;before the screen&quot;.
This means that 'The one (you) on the other side the screen'.
The sentence seems to be in an advertisement.
Translation:
Some friends (of the speaker) joked about baldness being the most worrying problem among adolescents.  And are you, who are on the other side of the screen, also worrying about where have your hairs went?