Hello, dear anonymous!
It is not necessary to explain the reasons to be anonym in the Internet. Residents of some authoritarian countries may be prosecuted for careless statement in the Internet. Every person can have not only one reason to be anonymity.
Best way to ensure anonymity in the Internet is to use Tor browser.
How to configure Tor Browser:
TOR Browser does not require specially settings or installation to start using. Just download and run it!
1. Go to TOR Project web page: https://www.torproject.org/
2. Click on "Download" button from the top menu:
3. Choice language from the menu and click to "Download Tor Browser" button.
4. That is all. So you can run and use TOR Browser.
Please note: TOR browser will not guarantee your anonymity in the network if you do not follow safety rules:
2. You do not have to leave your personal data.
3. You should not download and install any software via TOR Network.
Good luck! Be careful and not be caught :)