A retargeting banner is a form of online advertising that uses cookies to track and display targeted ads to users who have previously visited a website or engaged with a brand. These banners are strategically placed on other websites and social media platforms, reminding potential customers of products or services they have shown interest in. By utilizing data and analytics, retargeting banners aim to increase brand awareness, drive conversions, and ultimately, boost sales. This method of advertising is highly effective in re-engaging with potential customers and converting them into loyal buyers.