What Online marketing is
A form of marketing that combines traditional marketing principles with the unique interactive qualities of the Internet. The purpose is to deliver products and services that satisfy customers. Online marketers devise plans and campaigns to attract customers to a Web site and to encourage them to register their names or purchase products. There is also a growing number of online marketers that focus on being affiliates (sellers or resellers of information).
The meaning of E-business
Any business that is deriving revenue at least in part from something "electronic," usually on the Internet. It also refers to a strategy or service that enables a business to do more business because of Internet-related technology (see: Cisco, for example). The tendency for companies to put an "e" in front of a new product or service primarily comes from marketing departments that are trying to convince consumers they have an online strategy. The traditional brick-and-mortar firms that are starting an online component will use this marketing term to announce they are now online.