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Google Analytics is a simple, easy-to-use tool that helps website owners measure how users interact with website content. As a user navigates between web pages, Google Analytics provides website owners JavaScript tags (libraries) to record information about the page a user has seen, for example the URL of the page. The Google Analytics JavaScript libraries use HTTP cookies to "remember" what a user has done on previous pages / interactions with the website.

Cookie	Durée	Description
_ga_*	2 years	Google analytics cookie.Used to distinguish users.
_gat_*	1 minute	Google Analytics cookie.Used to throttle request rate. If Google Analytics is deployed via Google Tag Manager, this cookie will be named _dc_gtm_<property- id>.
_gid_*	24 hours	Google Analytics cookie. Used to distinguish users.

Oniads is a tool that allows us to measure digital media campaigns.

Hotjar is a visual tool that allows us to see user behaviour on the web and to make modifications according to the data obtained. Hotjar is a visual tool that allows us to see user behaviour on the web and to make modifications according to the data obtained.

Cookie	Durée	Description
_hjCachedUserAttributes	session	Hotjar. Collected attributes will only be saved to Hotjar servers if the user interacts with a Hotjar Feedback tool.
_hjid	1 year	Hotjar. Ensures data from subsequent visits to the same site are attributed to the same user ID.
_hjSessionUser_	1 year	Hotjar cookie that is set when a user first arrives at a page with the Hotjar script. It is used to preserve the Hotjar user ID unique to that site in the browser. This ensures that behaviour on subsequent visits to the same site will be attributed to the same user ID.
_hjUserAttributesHash	session	Hotjar. Enables us to know when an attribute has changed and needs to be updated.
_hjViewportId	session	Hotjar. Stores user viewport details such as size and dimensions.