system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Exactly what does a conductor do in an orchestra? Why is he so important?
gpt
If you look at crowds when they have to clap at the same time, it's never really in synch, there is always some people clapping too early and some clapping late.

If the singer/entertainer takes the time to clap, the claps get a lot more synched, that's because everyone pays attention to one person's predictable gestures and time their clap with it.

The conductor swings his stick in a way that every musician can time the notes in  a predictable way.

He also tells  some musician when a side of the band isn't loud enough or one instrument doesn't sound right.