What is a p2pool?

[wingless]

Noob warning....

Can someone please explain to me what a p2pool is? I'm trying to solo mine myriad coin, but apparently the wallet doesn't support solo mining...I was told you could use a p2pool as a way to solo mine. Is this true, and if so, how does this work?

Could someone show me how to setup a p2pool for yescrypt on a windows pc?

I'd appreciate any help anyone is willing to offer.