The internet has truly taken the world by storm over the past decade or so and provides people with the luxury of being able to do a number of things that would otherwise take much time to achieve. Instead of heading to the card outlet, filling out the one you buy, and then traveling to the post office, you can send free e-cards that say the same thing. On top of that, you can even customize your free e-cards so that they fit nearly any occasion you could imagine.
Free e-cards provide a time effective and costless way to show people you care. Almost everyone has the internet and email making it quite practical to send cards through it. You can do everything from send a get-well wish, to a happy birthday with e-cards and attach text saying anything you would say on a store bought card.