The animal known as man's best friend is the dog. This affectionate title stems from the long history of companionship between dogs and humans, dating back thousands of years. Dogs have been domesticated for various roles, ranging from hunting and herding to providing assistance and companionship. Their loyalty, intelligence, and ability to form strong emotional bonds with humans are key reasons they are often referred to as "man's best friend." Different breeds serve diverse functions, including service dogs, therapy dogs, and family pets. Dogs enrich human lives with their love, playfulness, and protective instincts, solidifying their spot in households worldwide.