e-business means electronic business, which in turn means that business transactions and practises are taken care of electronically rather than physically.

Example: Sending an invoice to one of your vendors as an attachment to an e-mail instead of putting a printed version in an envelope.
Another example: Advertising your products, services or knowledge on the internet instead of in a newspaper or by mouth-to-mouth.

This node once nuked because of stupid advertising. Don't make me do it again...