Okay kiddo, let me explain to you what a net party is in a way that's easy to understand. A net party is like having a sleepover with your friends, but instead of staying in one house, you all connect your computers to the internet and play video games together.
Just like in a sleepover, you and your friends can chat, laugh, and have fun together while you play games. You can challenge each other to see who can get the highest score or work together as a team to beat the game.
Nowadays, people can have net parties with friends from all over the world thanks to the internet. You can connect with people from different countries and play games with them just like they are right next to you.
So there you go, a net party is just like having a fun sleepover with your friends, but you play games together online. Hope that explains it to you!