A physical neural network is like an electronic brain! Just like your real brain has millions of neurons that work together to understand the world around you, a physical neural network uses tiny electronic parts to simulate the same kind of behavior. Inside the physical neural network are many small circuits called “nodes” that act like neurons in the brain. These nodes are connected to each other in a way that makes it possible for them to “learn” based on what it is told. Then, the neural network can use this knowledge to solve problems or answer questions.