Banner formats in affiliate marketing refer to two main aspects: the physical dimensions and the file type of advertising banners.

• Dimensions define the banner’s size, such as 300x250 pixels or 728x90 pixels, and are crucial for placement on websites and for visibility.
• File format refers to the technical type of the banner, such as static formats like GIF or JPEG, animated GIFs, or interactive HTML banners. Each format has different requirements in terms of loading time, design flexibility, and compatibility.

At selecdoo, it's worth noting that classic banners are becoming less relevant in affiliate marketing. One key reason is that many users now use ad blockers, which limit the visibility and effectiveness of banner ads. As a result, modern affiliate campaigns are shifting more toward alternative formats like native ads, text links, or content-based promotions, which are less likely to be blocked and generally have higher user acceptance.

Summary:
“Banner formats” in affiliate marketing refer to the technical specifications of banners, including size and file type. However, due to ad blockers and changing user behavior, the use of banners is declining in favor of more engaging, less disruptive ad formats.