Using this site does not require you to send or give any personal data.
Every visitor is clearly informed that a cookie might be stored on his computer by visiting the website.
Such a cookie does not allow the website to personaly identify the user. Usually, a cookie can store any information regarding the browsing history of a user on one website (consulted pages, dates and hours of viewing etc), and that history can be read later for every visit.
But not here ! On my website, only two cookies are used :
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This website is dedicated to explain everything about cookies, and therefore is really more complete than the following explanation.
For instance, you can also check out wikihow.com/Disable-Cookies.
A user can decide to block cookies, and therefore no cookies will be stored (and, obviously, the related functionalities won't work).
You should know how to do it by yourself on your computer, but there is a google research link to learn how to do it.