“A cookie is a small file stored by a server in the terminal (computer, telephone, etc.) of a user and associated with a web domain (i.e. in most cases with all the pages of the same website). This file is automatically sent back when the user contacts the same domain again.
Cookies have multiple uses: they can be used to memorize your customer ID with a merchant site, the current contents of your shopping cart, the language in which the web page is displayed, an identifier that allows us to track your navigation for statistical or advertising purposes, etc.
There are several types of cookies:
“Necessary”, internal cookies, allow information to be recorded between two visits to the same website on the same device. They allow the recording of a shopping cart, connection identifiers or interface personalization elements. They do not require the user’s consent.
“Statistical” cookies are used to track the actions of a user on a website. When the statistics are anonymous (i.e., do not allow a person to be identified), the user’s consent is not required.
“Internal” or “first-party” cookies are deposited by the site visited. They can be deposited in addition to the necessary cookies and can be used to collect personal data, track user behavior and serve advertising purposes.
“Third party” cookies are cookies placed by (or for) a site B (often an advertising agency) on a site A: this allows site B to see which pages have been visited on site A by a user and to collect information about him.
The information stored on the terminal is theoretically limited to the domain being visited. In practice, this is not only the case for “first-party” cookies deposited by the main domain. In fact, web pages can include content from other domains.
For example, if ecommerce1.com and ecommerce2.com both include content from advertiser.com, then the advertiser.com server may use third-party cookies to track the user’s browsing on both ecommerce1.com and ecommerce2.com.a”