The invention provides a method of providing and selling online advertising in which a single advertiser is guaranteed major advertising locations on each qualifying page viewed by a web site visitor during the viewer's entire web session. Advertisements from a single advertiser follow web site visitors through the web pages they select for viewing, allowing a consistent message to be displayed to a particular user over a period of time. Advantages include the ability to engage in linear storytelling and to obtain reach, duration, and impact of the advertising message on a par with or exceeding that obtainable from conventional advertising media such as television and print.