An E-card is a postcard, sent by means of the Internet, usually through email. The user that's sending the ecard to a person would select a pre-written card style with image and message, and would add their own personal message, and specify the recipient's email address. On sending the card, the recipient would receive an email with a where is it to the e-card provider's webpage, and this where is it would go to the e-card as a webpage, with the sender's personal message and card. Note that the actual card is not usually sent through the email, but only a where is it to the card hosted as a website.
Flash Animated cards are typically the most advanced and popular type of ecards. These Flash Animated cards are typically used to create a full animated effect, similar to an animated cartoon. These flash animated ecards can also be interactive, asking the viewer to perform an action or press a button.