A companion banner is a type of online advertisement that is displayed alongside the main content on a webpage, typically in the form of a rectangular or square graphic. Unlike traditional banner ads, which are often placed at the top or bottom of a webpage, companion banners are strategically placed next to the main content to provide additional information or promote related products or services. They are designed to complement and enhance the user’s browsing experience, rather than disrupt it. Companion banners are commonly used in digital marketing campaigns to increase brand awareness, drive traffic to a website, and ultimately, generate leads or sales.