If you have a business - brick and mortar, storefront, online or freelance, you need business cards. A professionally printed business card sets you apart from everybody else hanging out their shingle for business. Because business card printing is so inexpensive, it is no longer OK to buy some perforated card sheets at your local office supply store and print them yourself. For prospective clients and customers, a professionally printed business card means, literally, that you are all business. By having business cards printed by a printing specialist, you show that you are serious enough about your business to invest in professionally crafted promotional materials.