Abstract: A navigable computer site (web site) includes an information storage and retrieval means linked to the computer site. An associated magazine displays promotions of various products, services or the like. Each promotion has a unique promotion identifier associated with the promotion product/service. The navigable computer site is accessible by a registered reader who can input a unique promotion identifier relating to a particular promotion in the printed publication, to access further information on the product, service or the like associated with that promotion or the web site. Details of the readers accessing of that further information on the promotion are input to the database and are accessible to the organisation who placed the promotion via the navigable computer site following entry of an appropriate personal identifier relating to that organisation. This allows an advertiser placing a promotion to obtain real time feedback on the success or otherwise of a promotion in quantitative terms.