Arthur integrated Google Tag Manager across five pages in the ArthurSeche/eleve6 repository, enabling analytics tracking and marketing campaign monitoring throughout the site. He updated confirmation, contact, exercice1, exercice2, and hello HTML files by embedding both the GTM script and noscript/iframe fallbacks, ensuring data collection even when JavaScript is disabled. The work was managed with disciplined, per-page commits, providing clear traceability and rollback capability. Using HTML and JavaScript, Arthur established a reliable foundation for cross-page analytics, supporting data-driven decision-making and campaign optimization. The project demonstrated focused application of analytics integration and web development skills within a concise, targeted scope.