Network science is a way to study relationships between different people, things, or ideas. It's like a map of all the connections between different parts of the world. Network science looks at how all the different connections work and what happens when those connections change. For example, in networks of people, network science can show us how different people are connected, who is an important influencer, and how decisions and ideas can travel through the network. In networks of ideas, network science can show us how different ideas connect, what paths can influence an idea, and how to make an idea spread.