I think there is something to be said about google and big techs goals of manipulating public opinion by manipulating your personal opinion. 
They do this in part by creating a profile of each user based on their data and metadata (email, chats, location, search history, device tracking, third party data, purchase history, social media, etc.) so the more data you give them by using their products the more accurate their model of you is and that makes their propaganda campaigns more effective. 
They manipulate people by subtle algorithmic changes, sorting search results, promoting content that triggers or deflates, shadow banning and limiting reach, and probably way more frightening ways in the future now that they have AI doing the heavy lifting. 
Social engineering on a mass scale.