There is no privacy on the Internet. The Internet goes just about anywhere and everywhere. It's not just your computer and smartphone; your refrigerator, TV<ref>https://bgr.com/2015/02/06/samsungs-smart-tv-privacy-policy/</ref> and game console are connected to the Internet. They are listening to you and watching you<ref>https://www.ted.com/talks/malte_spitz_your_phone_company_is_watching</ref>. So, there is no privacy '''anywhere'''. Unless you are actively conscious and work to create privacy.
Using Facebook and other 'social' media is the worst thing you can do for your privacy. <ref>https://webtap.princeton.edu/blog/</ref>
This page is about some of the privacy enhancing tools and techniques that you can employ individually, or in your enterprise using free software.