Postcards can be one of the most powerful marketing tools for a business. They convey an important image of your brand because it is a tangible / visible representation of the message that you are sending. Direct mail postcards are great way to send a message into a person's home. You can also just hand out postcards in person, at conventions, or at your storefront. Use the postcards for displaying price lists, restaurant menus or a description of your products and services and contact information.