Knowledge Graph is used for lots of stuff, not just answering facts. It helps to know what an entity is for many reasons. Let's say you're searching Google Pho

Knowledge Graph is used for lots of stuff, not just answering facts. It helps to know what an entity is for many reasons. Let's say you're searching Google Photos for "Mammals". Photos might have neural tags tagged for dogs, for dog breeds, and for very specific animals, but they might not be tagged for higher level concepts, like that a Dog is a Mammal. The KG tells you if a given term is a Point of Interest, a location, a landmark, a person, an actor or character, a film, food, and what not. This lets stuff like Now on Tap provide contextually relevant apps like IMDb for films, actors, etc or Open Table for Restaurants. I've found KG to be very useful for some queries, especially queries that produce Carousels, like "top ten movies in 1996"