Get customer response with shopper stopper bright, bold and durable retail signs, sale banners, and hanging signs that get attention. Promotional Signs and Banners are traffic-stoppers, and create an opportunity to get a shopper`s attention. Many retailers underestimate the powerful pull of an effective window sign. Before a retail store can sell merchandise to it`s shoppers, it has to entice them in first. This is where effective sale signs, banners and promotional display signs come in.