JustWatch helps users find where to legally watch movies by offering a one-stop app that allows customization and easy filtering based on providers like Netflix and Amazon Prime. Their business model involves building an adtech stack to target movie fans and make movie marketing more efficient for advertisers. Additionally, JustWatch Media buys media for entertainment brands across digital platforms, using their extensive data on audiences and content. They have offices in multiple cities and aim to connect entertainment fans with their favorite content worldwide.