An internet advertising system and method that provides a seller self-serve control for creation, publication, and display of advertisements on internet media venues owned or controlled by entities other than the seller in a form automatically modified to comply with the media venues' presentation rules, which may include design or style standards for "look and feel," editorial standards, and distribution factors. Self-serve, menu driven interfaces are provided for sellers to target internet media venues, and for internet media venues to enter their presentation rules. An ad modification engine processes or customizes the advertisement for publication and display on each internet media venue in compliance with the media venue's presentation rules. The system also includes an online reporting tool, an interface for a seller's accounting management system to automatically update advertisements and control publication timing, and a buyer interface for purchase, reservation, or referral regarding the advertised product or service.