Need advice/tips growing my audience.

Hello.

I currently run a discord server.
I work at other places and i know in general how the whole process of Services work.
I want to get more customers.

I got workers etc.
I want to know, what would be good ways to grow my audience.

I don't really find Sponsor a good thing, it's mostly for growing your member count.
I thought maybe in-game advertising could be a good?

What would be your choice/advice?