During March 2025, Mauro Bazan developed a new promotional banner feature for the hlxsites/24petwatch repository, focusing on dynamic marketing content in the website header. He implemented the banner using JavaScript, HTML, and CSS, enabling it to load dynamically, be dismissed by users, and persist its closed state via localStorage. The solution was integrated into both paid and general header components, ensuring consistent user experience and styling across the site. By allowing marketing campaigns to be updated without code changes, Mauro’s work reduced deployment cycles and improved responsiveness, demonstrating practical frontend engineering and UI/UX implementation within a real-world project.