Deep learning is a field that's all about making computers do things, but sometimes, those things are just a little... wonky. Backpropagation is the algorithm that makes it all work, but don't worry, we won't make you do any math.
It's like a magic trick, but with neurons and gradients. You give it some inputs, it gives you some outputs, and you're left wondering, "Wait, how did it do that?"
Want to learn more about the dark arts of backpropagation?