Unfortunately, there are not as many examples of the Firemaking Charm for recreational purposes in the Harry Potter movies and books as there are for destructive uses, such as when the Death Eaters to set Hagrid’s hut on fire in the original novel Harry Potter and the Half-Blood Prince.
As dusk is approaching and it looks like a good time to roast some marshmallows, no need to spend hours rubbing two sticks together when you can just use say “Incendio” to spark a campfire.