Dogs pant to help regulate their body temperature. They don't sweat like humans do, so panting is their primary way to cool off.
Dogs also pant when they're excited, such as when they're playing or meeting new people.
Dogs pant after exercise to cool down and recover.
Some medical conditions, such as heatstroke, respiratory problems, and heart disease, can also cause dogs to pant excessively.
If your dog is panting heavily and excessively, it could be a sign of a medical problem.
If you're concerned about your dog's panting, it's always best to see a veterinarian to rule out any underlying medical conditions.
Take them to a cool place, such as a shady spot outdoors or an air-conditioned room.