Banner advertising is a type of online advertising that uses a graphical image, usually in the form of a banner, to promote a product, service, or website. Banner ads are typically displayed on websites, blogs, and social media platforms, and are used to attract visitors to a website or to promote a product or service. Banner ads are typically placed in strategic locations on a website or blog, and are often used in conjunction with other forms of online advertising, such as search engine marketing and social media marketing.