{"id":5461,"date":"2026-08-20T09:25:00","date_gmt":"2026-08-20T09:25:00","guid":{"rendered":"https:\/\/www.digitalanalyticslab.com\/?p=5461"},"modified":"2026-08-26T19:38:16","modified_gmt":"2026-08-26T19:38:16","slug":"que-se-passe-t-il-pour-vos-donnees-analytiques-lorsquun-cookie-tiers-disparait","status":"publish","type":"post","link":"https:\/\/www.digitalanalyticslab.com\/fr\/insights\/que-se-passe-t-il-pour-vos-donnees-analytiques-lorsquun-cookie-tiers-disparait\/","title":{"rendered":"Que se passe-t-il pour vos donn\u00e9es analytiques lorsqu&rsquo;un cookie tiers dispara\u00eet ?"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-left\">Le changement progressif que la plupart des \u00e9quipes n&rsquo;ont pas encore pleinement int\u00e9gr\u00e9<\/h2>\n\n<p class=\"wp-block-paragraph\">La suppression progressive des cookies tiers fait l&rsquo;objet de discussions depuis des ann\u00e9es, navigateur par navigateur, annonce par annonce, souvent avec des retards qui ont conduit certaines organisations \u00e0 reporter le probl\u00e8me. Mais la tendance de fond \u2013 les navigateurs, les r\u00e9glementations sur la protection de la vie priv\u00e9e et les cadres de consentement restreignant progressivement les donn\u00e9es pouvant \u00eatre suivies et leur dur\u00e9e de suivi \u2013 ne concerne pas un seul type de cookie. Il s&rsquo;agit d&rsquo;une transformation structurelle de la quantit\u00e9 de donn\u00e9es que les plateformes d&rsquo;analyse peuvent collecter passivement, ainsi que de la dur\u00e9e de conservation et de l&rsquo;agr\u00e9gation de ces donn\u00e9es.  <\/p>\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1500\" height=\"1200\" src=\"https:\/\/www.digitalanalyticslab.com\/wp-content\/uploads\/2026\/06\/jb1tf3kvsa.jpg\" alt=\"&#xE9;cran plat noir\" class=\"wp-image-5385\"\/><\/figure>\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n<p class=\"wp-block-paragraph\">Pour les organisations qui n&rsquo;ont pas pris les devants, les sympt\u00f4mes apparaissent g\u00e9n\u00e9ralement progressivement : des donn\u00e9es de conversion qui se d\u00e9gradent l\u00e9g\u00e8rement avec le temps, des audiences qui diminuent sans raison apparente li\u00e9e aux campagnes, et des mod\u00e8les d&rsquo;attribution qui valorisent de plus en plus le trafic \u00ab direct \u00bb ou \u00ab non attribu\u00e9 \u00bb. Il ne s&rsquo;agit pas de bugs, mais des effets visibles d&rsquo;un environnement de mesure qui devient structurellement moins observable. Ces effets persisteront, m\u00eame en cas de report de la date limite de suppression des cookies.  <\/p>\n\n<h2 class=\"wp-block-heading has-text-align-left\">L\u2019infrastructure de donn\u00e9es de premi\u00e8re partie comme r\u00e9ponse pratique<\/h2>\n\n<p class=\"wp-block-paragraph\">La r\u00e9ponse la plus durable \u00e0 cette \u00e9volution consiste \u00e0 mettre en place une infrastructure de mesure totalement ind\u00e9pendante des m\u00e9canismes de suivi tiers. Cela implique la collecte de donn\u00e9es c\u00f4t\u00e9 serveur, des strat\u00e9gies de cookies propri\u00e9taires sur votre propre domaine et, surtout, la mise en place d&rsquo;une infrastructure de consentement et d&rsquo;identit\u00e9 permettant d&rsquo;associer le comportement des utilisateurs \u00e0 des clients connus lorsqu&rsquo;ils sont connect\u00e9s ou se sont identifi\u00e9s d&rsquo;une autre mani\u00e8re. <\/p>\n\n<p class=\"wp-block-paragraph\">Cela implique \u00e9galement de repenser la notion d&rsquo;attribution \u00ab suffisante \u00bb. Une attribution parfaite, granulaire et multi-appareils a toujours \u00e9t\u00e9 quelque peu illusoire, m\u00eame \u00e0 l&rsquo;\u00e8re du suivi illimit\u00e9. L&rsquo;objectif r\u00e9aliste est un mod\u00e8le de mesure fiable, coh\u00e9rent dans le temps et transparent quant \u00e0 ses limites, plut\u00f4t qu&rsquo;un mod\u00e8le produisant des chiffres d&rsquo;apparence pr\u00e9cise \u00e0 partir d&rsquo;une collecte de donn\u00e9es de plus en plus fragile.  <\/p>\n\n<h2 class=\"wp-block-heading has-text-align-left\">Par o\u00f9 commencer<\/h2>\n\n<p class=\"wp-block-paragraph\">Pour la plupart des organisations, le point de d\u00e9part est un audit des d\u00e9pendances actuelles en mati\u00e8re de collecte de donn\u00e9es : quels rapports, tableaux de bord et d\u00e9cisions reposent sur des m\u00e9canismes de suivi dont la fiabilit\u00e9 diminue, et quel serait l\u2019impact concret d\u2019une d\u00e9gradation accrue de ces m\u00e9canismes ? Ensuite, la priorit\u00e9 est g\u00e9n\u00e9ralement d\u2019associer le marquage c\u00f4t\u00e9 serveur pour garantir la r\u00e9silience des donn\u00e9es propri\u00e9taires, la conception de mesures respectueuses du consentement et une r\u00e9\u00e9valuation r\u00e9aliste des mod\u00e8les d\u2019attribution au regard de ce qui est r\u00e9ellement mesurable aujourd\u2019hui. <\/p>\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1600\" height=\"1067\" src=\"https:\/\/www.digitalanalyticslab.com\/wp-content\/uploads\/2026\/06\/es33oexarre.jpg\" alt=\"Mains tapant sur un &#xE9;cran d'ordinateur portable\" class=\"wp-image-5383\"\/><\/figure>\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n<p class=\"wp-block-paragraph\">Il ne s&rsquo;agit pas d&rsquo;un projet ponctuel que l&rsquo;on peut mener \u00e0 bien une fois pour toutes. Le paysage de la protection de la vie priv\u00e9e et des navigateurs \u00e9volue constamment, et une infrastructure de mesure con\u00e7ue pour \u00eatre adaptable \u2014 plut\u00f4t qu&rsquo;optimis\u00e9e pr\u00e9cis\u00e9ment pour les r\u00e8gles actuelles \u2014 n\u00e9cessitera des refontes beaucoup moins perturbatrices \u00e0 mesure que ces r\u00e8gles \u00e9volueront. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le changement progressif que la plupart des \u00e9quipes n&rsquo;ont pas encore pleinement int\u00e9gr\u00e9 La suppression progressive des cookies tiers fait [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5460,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[38],"tags":[],"class_list":["post-5461","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-analyse-de-donnees"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Que se passe-t-il pour vos donn\u00e9es | Laboratoire d&#039;analyse num\u00e9rique<\/title>\n<meta name=\"description\" content=\"Le changement progressif que la plupart des \u00e9quipes n\u2019ont pas encore pleinement int\u00e9gr\u00e9 La suppression progressive des cookies tiers fait\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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