for examplelet' say that our nice young lady in the preceding image watched star wars and the empire strikes back and liked both of themso rated them both five stars or something nowalong comes mr edgy mohawk man who also watched star wars and the empire strikes back and also liked both of them soat this point we can say there' relationshipthere is similarity between star wars and the empire strikes back based on these two users who liked both movies what we're going to do is look at each pair of movies we have pair of star wars and empire strikes backand then we look at all the users that watched both of themwhich are these two guysand if they both liked themthen we can say that they're similar to each other orif they both disliked them we can also say they're similar to each otherrightsowe're just looking at the similarity score of these two usersbehavior related to these two movies in this movie pair soalong comes mr moustachy lumberjack hipster man and he watches the empire strikes back and he lives in some strange world where he watched the empire strikes backbut had no idea that star wars the first movie existed