Flea shampoo is a type of dog grooming product that helps to remove fleas and their eggs from your pet's coat, preventing further infestation. It usually contains ingredients such as pyrethrins or piperonyl butoxide which are effective in killing the fleas on contact. The shampoo is applied to the dog's fur, left for a few minutes and then rinsed off. Regular use of flea shampoo can help control flea infestations and keep your pet healthy and comfortable.