Fun fact: Our body uses carbs, A LOT. It makes up most of the calories we eat on a daily basis. And it's from all the foods we love, too. Breads, pasta, beans, fruits and all that good stuff.
BUT, like anything good, too much isn’t going to go well for you. A lot of carbs lead to a lot of weight, and while carbs are excellent for building muscle, it doesn't help if the carbs go straight to fat cells and not muscle cells (unless that's what you want? No judgement here)
Instead, a bunch of products exist to help your body manage its carbs, shuttling them right to your muscles so they can swell up, top themselves off on energy storage and be ready for the next time you have to lift!