"Promotional banners" refer to signs or flags used to advertise a product, service, or event. They are usually placed in public spaces to attract attention and promote something specific. Full definition
Four new promotional banners for Fox's upcoming X-Men universe series THE GIFTED are now online. (x-menfilms.com)
The incredible promotional banner above comes courtesy of @MegaPowerBrasil on Twitter, and features a great look at the new Fallen Kingdom Tyrannosaurus Rex and Blue. (jurassicoutpost.com)