A pulse-forming network is like a magic box that helps to create very strong pulses of electricity for doing a particular task. Let's imagine you have a really big water balloon that you need to fill up with water quickly. You have a small water tap that can only give a little bit of water at a time. However, if you use a magic box that helps to collect and concentrate the water, you can get a lot of water to fill up the balloon very fast.
Similarly, a pulse-forming network helps to collect and concentrate electricity from a power source and then release it in a very quick and powerful burst. This burst of electricity can be used for things like creating a high-energy laser beam or powering a particle accelerator.
Just like how the magic box for water has different parts to it, a pulse-forming network also has components like capacitors, switches, and resistors that work together to create the right kind of burst of electricity. With the help of this magic box, scientists and engineers can do some amazing things that we can't do otherwise!