I think I’ve searched on Google for most movies I’ve ever watched. Maybe that makes me a weird person, I don’t know. If you search for a movie on Google, you get a lot of information, including reviews, actors, links to rent it on Google Play Store, Amazon, watch it on various streaming services, etc. There’s money to be made being the place people go when they want things. Actually that’s how Google makes most of its money - companies pay a finders fee to have that demand directed toward them. Content ads are a smaller business.