If you use social media at all, especially Arsebook, Google or other search engines, then those tech companies will know more about you than you remember about yourself. If you use a device with your location like a mobile, regardless (as we have just found out from a Google leak) whether you have it turned on or off all your movements are recorded and if you have a voice activated
spy assistant, then they have your conversations and voice analysis. Include any pictures on the Internet then you are in facial recognition databases. Arsebook share & sell all this data to Russia & China and anyone else they can make a buck from, where you are the product.
All the search engines know lots about all of us from OOF where the website is spidered and indexed regularly.
This a 21st century fact of life and when the Axis of Evil (China, DPRK, Iran & Russia) rule the world then we will all be cradle to grave micro monitored, managed, rewarded & punished using China's 'Good Citizen' monitoring system. A little later than planned but welcome to 1984 anyway.