For example,I provided Youtube access to my data through my google profile. Youtube collects data through the google analytics channels, measuring how much of a video is watch, the category of videos watched, the amount of times a specific video is watched. The subscriptions feature updates me via email and app notifications when content creators you subscribe to release new content, to ensure I'm consuming personally relevant content. The site also promotes trending content and uses personal data collected by themselves and google to ensure that the opening advertisements I watch are also personally relevant to me.

Can you identify some companies that you've provided information for? How are they using the knowledge about you in their communication? What do you think they can improve?