In a world where most of the activities happen online, it is very hard to actually maintain ever a shed of privacy, since unknown to us, our online movements are always tracked.
The moment you log onto any website through browsers, cookies are saved and out of these some, that are known as tracking cookies, track your online activity, trying to create a profile for you, which is then used by advertising agencies and other businesses to bring you ads that you might be interested in.
All of this, that starts with your single click, continues without you notice, breaching essential privacy laws.