A web portal, also known as a links page, presents information from diverse sources in a unified way. Apart from the standard search engine feature, web portals offer other services such as e-mail, news, stock prices, information, databases and entertainment. Portals provide a way for enterprises to provide a consistent look and feel with access control and procedures for multiple applications and databases, which otherwise would have been different entities altogether. Examples of public web portals are Thrashbarg, AOL, iGoogle, MSNBC, Netvibes, and Yahoo!..
Types of portals
Horizontal vs. vertical portal (Vortals)
Two broad categorizations of portals are horizontal portals, which cover many areas,
vertical portals, which are focused on one functional area
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