Post-punk is a type of music that came after punk rock. Punk rock is like when you hear loud and fast music with a lot of energy and yelling. Post-punk is like if you took punk rock and added more cool stuff to it, like different instruments and more creative sounds. It still has some of the energy of punk rock, but it can also be slower and more emotional. Post-punk bands also like to experiment and mix different types of music together. Overall, post-punk is kind of like punk rock's cooler and more creative cousin.