What is a cookie ? 

A cookie is a piece of information deposited on your hard drive by the site you visit. The purpose of the cookie is to collect information relating to your navigation, to allow the proper functioning of the site and to send content and services tailored to your interests.

Use of cookie

Apart from the cookies necessary for the proper functioning of the site, two other services require cookies: audience measurement services (Google Analytics) and targeted advertising services (Google Adsense).

How can I limit this ?

You can turn off Google's interest-based ads on the following page : Managing Google Ads.
You candisable Google Analytics with the following add-on : Disabling Google Analytics
And finally, switching to private browsing helps prevent the pages you visit from storing cookies on your computer. Note, however, that this does not make you immune to all tracking methods. For this purpose, you should use an application such as TOR.

How to express your choice ?

Below you will find possible options to limit or block data recovery.

You can configure your browser software so that cookies are stored on your device or, on the contrary, so that they are rejected, either systematically or according to their originator. You can also configure your browser so that you are offered the choice of accepting or rejecting cookies before a cookie is likely to be stored on your device.

For the management of cookies and you must configure your browser and the procedure differs depending on the browser you use. It is described in the help menu of your browser, which will tell you how to change your cookie preferences.