Eli5 what the heck is solid rocket fuel

Question

Edit thanks everyone, I’m not sure why I wasn’t understanding but you’ve all clarified it for me

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Answer 1

Presumably you know what gunpowder is right? It’s a powder then, when ignited, rapidly combusts and produces a large amount of hot gas. Solid rocket fuel is just like gunpowder but compressed into a solid shape. You just take a mixture of powders that do roughly the same thing as gunpowder, compress them into a solid, and you’ve got solid rocket fuel. In some cases, like with fireworks and model rockets, the solid rocket fuel is just straight up gunpowder.