Dogs are loyal, intelligent, and friendly animals that have been companions to humans for thousands of years. Known as "man's best friend," they come in a wide variety of breeds, each with its own unique characteristics, size, and temperament. Dogs are social animals, often forming strong bonds with their owners and families. They are used in various roles, such as pets, service animals, and working dogs in fields like law enforcement and therapy. Their playful, protective, and affectionate nature makes them beloved by people worldwide.