Boo, widely known as the World's Cutest Dog, was a Pomeranian that became an internet sensation in the early 2010s due to his unique short haircut and teddy bear-like appearance. With a massive following on Facebook and several published books, Boo's image became a staple for wholesome internet culture. In the meme world, Boo is primarily used as a symbol of pure innocence, joy, and the ultimate 'Aww' factor. Whether used to react to positive news or to contrast something gritty with extreme cuteness, Boo remains the gold standard for pet-based viral content and digital comfort.