Flyers can be used for a multitude of things. For example, a well-designed flyer can be used as a leave-behind, just like a business card. If the flyer contains special offers, especially ones with a limited time frame, it serves as a reminder to people the same way a call-to-action does. They can also be used as a reminder to prospects you previously met with. Either way, you want your flyers to leave something with the customer, rather it be the physical sheet itself, or a lasting impression from the design.