A knowledge network is like a big circle of friends who all know different things. Just like you might ask your friend who is good at drawing to teach you how to draw a picture, a knowledge network is a group of people who can help each other by sharing their skills and knowledge.
You can think of a knowledge network like a web, with each person in the network having their own little string. When you need to learn something, you can pull on one of those strings and get the information you need. But you also have your own string that other people can pull on when they need your help.
These days, knowledge networks are often online. So instead of being in the same room as all your friends who know different things, you might be connected to them through the internet. This means you can learn from people all over the world who are experts in different areas.
For example, if you need help with math homework, you can join an online knowledge network where mathematicians can answer your questions. Or if you want to learn how to cook, you can watch cooking videos made by chefs in a knowledge network for cooking enthusiasts.
So when you're part of a knowledge network, you're always learning new things and also helping others learn too!