A scale-free network is a type of network that is made up of different sized pieces, like a Lego set. Each piece in a scale-free network is different and has its own connections to other pieces. So if you look at the network, you'll see different sized clusters of pieces, or nodes, connected together. It's like a web because the pieces connect to each other in different ways. This type of network is useful for modeling relationships between real-world things like websites, people, or companies. It can also help us understand how diseases spread or how information moves around the internet.