Book excerpt: A Web Portal is a special web site designed to act as a gateway giving convenient access to other related sites. This book investigates the various types of portals and describes how they can be used in business applications. After considering the nature of portals, the book describes the first general portals like Yahoo, and how they came into being. Portals are used in businesses of all types and sizes and this book discusses how portals can be used in large business corporations as well as small to medium enterprises. Web portals have increasing importance to marketers as, by their nature, they retain their users who must return to them frequently. They also provide a useful means of making information and knowledge readily available in a convenient form to authorised users. This book covers a wide range of issues relating to the use of portals in business.