Technically, you can swap them. Bouillon is just dehydrated broth that got a serious glow-up in cube form. Think of it as broth’s concentrated, slightly dramatic cousin who always shows up to the party with a bit too much energy.
The real trick is knowing how to handle it so you don’t accidentally turn your dinner into a salt lick. Broth is ready to go; bouillon needs a little coaxing back to life.