Greeting card, a great post
For starters, they allow us to keep in touch with family and friends we may not have had the chance to contact for weeks or even months if our schedules have no room for social time. An almost endless variety of cards in any theme imaginable is right there at your fingertips. And, if you cannot find something you like, try customizing or creating your own. Sending birthday cards over the Internet means no postage to buy and no trip to the nearest mailbox or post office. The convenience alone makes them worthwhile.