web portal

A web portal 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, and entertainment. Portals provide a way for enterprises to provide a consistent look and feel with access control and procedures for multiple applications, which otherwise would have been different entities altogether. An example of a web portal is MSN, Yahoo!, and Google.

Two broad categorizations of portals are :

Horizontal portals (e.g. Yahoo)
Vertical portals (or vortals, focused on one functional area, e.g. salesforce.com).

An Internet gateway providing customers with access to online news and information, 24 hours a day, seven days a week.

you have shared a useful information about web portals it short it was really a brief introduction keep posting such information.

Though your information is good.I would like to mention specified types of web portal like hosted portal,domain specific portal.