If you use Google services, you might be knowing that Google collects some data about you to target you with relevant ads. Of all the information collected by Google, the most notable are your search queries when you are signed in (or even if you aren't), your location, your web browser cookies, and even your email. For example, if I Googled on how to buy tablets, I will see ads about online shops which sell tablets. Some users care a lot about their privacy and some of them just do not want any targeted ads. For those users, Google has a special set of settings.