A cookie is a small text file that a website saves on your computer or mobile device when you visit the site. It enables the website to remember your actions and preferences (such as login, language, font size and other display preferences) over a period of time, so you don’t have to keep re-entering them whenever you come back to the site or browse from one page to another. 

A cookie can be classified by its lifespan and the domain to which it belongs. By lifespan, a cookie is either a:

- session cookie which is erased when the user closes the browser or

- persistent cookie which remains on the user's computer/device for a pre-defined period of time.

As for the domain to which it belongs, there are either:

- first-party cookies which are set by the web server of the visited page and share the same domain

- third-party cookies stored by a different domain to the visited page's domain. This can happen when the webpage references a file, such as JavaScript, located outside its domain.

This site use session cookie and  first-party cookies.

You can control and/or delete cookies as you wish – for details, see aboutcookies.org. You can delete all cookies that are already on your computer and you can set most browsers to prevent them from being placed. If you do this, however, you may have to manually adjust some preferences every time you visit a site and some services and functionalities may not work.