I have an old flip phone . Though I do use Face Book , Gmail , PayPal and YouTube I don ' t have my phone attached to either of those accounts , same goes for Netflix . Face Book only sees things I do on FB . Videos I share and posts I like , oh and from time to time I go back a few days in my timeline to see things that were missed the first time around . Hum . allot of the adds I see on FB are unrelated to me , Heck I even got an add one time for some Female product so that shows for me at least FB it doesn ' t know me very well . With YouTube it seems to only track what I watched so my front page is somewhat more relevant usually showing me channels I ' m subscribed to and themesgeneras I ' m interested in and with most of these they have an I ' m not interested option . So in the case of YT I don ' t mind them tracking my accounts history which I can go through and delete , Same goes for the History on my GmailGoogle account too . I have no idea if you are able to remove your past activity inside your Operating System for windows 10 . Cookies as far as I know are mostly harmless and at least with FireFox can be turned off . I honestly don ' t have Windows 10 so I don ' t know if the adds they give you are through their OS store which weirds me out , random window popups or does Win 10 try to sell you things through adds in your browser ? And can you really opt out of this like you can for GoogleAmazon ads ? which should be an option to turn on not off . Other things I don ' t like about Win 10 is it apparently actively listens to your voice for key words like their Xbox one so the voice commands can work and if it ' s true Win 10 logs everything you type which is called a keylogger . Lastly I don ' t think it ' s Right for an OS to be trying to sell things to you . It ' s not their job ! An operating system is only suppose to communicate with your hardware in such a way that the games , software , and what have you can interact with each other and use your computer . I really don ' t like the idea of an OS being so intrusive . After Microsoft stops supporting my version of Windows depending on the situation at the time I may be moving over to Linux or something .