Dogs have a natural instinct to groom themselves, and licking their paws is one way they do this.
If a dog's paws are itchy, they may lick them to try to relieve the itch.
If a dog's paws are injured, they may lick them to try to soothe the pain.
If a dog has bacteria on its paws, licking them can spread the bacteria to other parts of the body.
Dogs have scent glands in their paws, and licking them can help to spread their scent.
If a dog knows that licking its paws will get attention from its owner, it may do it for that reason.
Clean your dog's paws regularly: Use a mild soap and water to clean your dog's paws after they come inside from outside.