Good, people should be pushed away from Chrome as strongly as possible given what Google is doing to it.
Go to settings / Privacy and Security / Ad Privacy.
By default, you give permission to: a) mine your history and provide it to websites / ad services b) mine your use within a website and provide it to ad services. c) feed telemetry back to ad services.
So much for consent. You need to manually opt-out of settings you didn't even realize were there.