A banner developer designs and creates digital advertising banners that are used in online marketing campaigns. Their responsibilities include conceptualizing banner designs based on client or campaign requirements, creating visually enticing graphics, incorporating interactive elements, and testing functionalities. They work with various software such as Adobe Suite, , , and JavaScript for banner creation. They also optimize banners for different platforms and screen sizes to ensure optimal performance. Regular collaboration with marketing teams, graphic designers, and web developers is crucial for a banner developer to deliver successful, engaging, and effective advertising banners.