A web portal is a site that functions as a point of access to information on the World Wide Web. Portals present information from diverse sources in a unified way. Popular portals are MSN, Yahoo, and AOL. Aside from the search engine standard, web portals offer other services such as news, stock prices, infotainment and various other features. 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.

A personal portal is a site on the World Wide Web that typically provides personalized capabilities to its visitors, providing a pathway to other content. It is designed to use distributed applications, different numbers and types of middleware and hardware to provide services from a number of different sources. In addition, business portals are designed to share collaboration in workplaces. A further business-driven requirement of portals is that the content be able to work on multiple platforms such as personal computers, personal digital assistants (PDAs), and cell phones.

Why portals?

It is often necessary to have a centralized application that has access to various other applications within the same enterprise to share the information across the applications. Also the various users with different roles accessing the different applications prefer to have a single access point to all of them over the Internet. They like to personalize the applications and have the coupled applications coordinated. Above all, the administrator users like to have administrative tools all in a single place to administer all the applications. All these are achieved through portals. Since all the applications share information through portals, there is better communication between various types of users. Another advantage of portals is that they can make event-driven campaigns. Below is detailed list of advantages of using portals:

Below are the properties of portals:

Development of personal portals

In the late 1990s, the web portal was a hot commodity. After the proliferation of web browsers in the mid-1990s, many companies tried to build or acquire a portal, to have a piece of the Internet market. The web portal gained special attention because it was, for many users, the starting point of their web browser. Netscape became a part of America Online, the Walt Disney Company launched Go.com, and Excite and @Home became a part of AT&T during the late 1990s. Lycos was said to be a good target for other media companies such as CBS.

Many of the portals started initially as either web directories (notably Yahoo!) and/or search engines (Excite, Lycos, AltaVista, infoseek, and Hotbot among the old ones). Expanding services was a strategy to secure the user-base and lengthen the time a user stayed on the portal. Services which require user registration such as free email, customization features, and chatrooms were considered to enhance repeat use of the portal. Game, chat, email, news, and other services also tend to make users stay longer, thereby increasing the advertising revenue.

The portal craze, with "old media" companies racing to outbid each other for Internet properties, died down with the dot-com flameout in 2000 and 2001. Disney pulled the plug on Go.com, Excite went bankrupt and its remains were sold to iWon.com. Some notable portal sites ? Yahoo!, for instance ? remain successful to this day. To modern dot-com businesses, the portal craze serves as a cautionary tale about the risks of rushing into a market crowded with highly-capitalized but largely undifferentiated me-too companies.

Corporate web portals

Corporate intranets gained popularity during the 1990s. Having access to a variety of company information via a web browser was a new way of working. Intranets quickly grew in size and complexity, and webmasters (many of whom lacked the discipline of managing content and users) became overwhelmed in their duties. It wasn't enough to have a consolidated view of company information, users were demanding personalization and customization. Webmasters, if skilled enough, were able to offer some capabilities, but for the most part ended up driving users away from using the intranet.

The 1990s were a time of innovation for the concept of corporate web portals. Many companies began to offer tools to help webmasters manage their data, applications and information more easily, and through personalized views. Some portal solutions today are able to integrate legacy applications, other portals objects, and handle thousands of user requests.

Today’s corporate portals are sprouting new value-added capabilities for businesses. Capabilities such as managing workflows, increasing collaboration between work groups, and allowing content creators to self-publish their information are lifting the burden off already strapped IT departments.

In addition, most portal solutions today, if architected correctly, can allow internal and external access to specific corporate information using secure authentication or Single-Sign-On.

JSR168 Standards emerged around 2001. Java Specification Request (JSR) 168 standards allow the interoperability of portlets across different portal platforms. These standards allow portal developers, administrators and consumers to integrate standards-based portals and portlets across a variety of vendor solutions.

Microsoft's SharePoint Portal Server line of products have been gaining popularity among corporations for building their portals, partly due to the tight integration with the rest of the Microsoft Office products. Research by Forrester Research in 2004 shows that Microsoft is the vendor of choice for companies looking for portal server software.

In response to Microsoft's strong presence in the portal market, other portal vendors are being acquired, or are challenging their offering. Oracle Corporation, in 2007, released Web Center Suite, a similar product to SharePoint. Web Center Suite has a full line of collaboration tools (blogs, wikis, team spaces, calendaring, email, etc.).

In addition, the popularity of content aggregation is growing and portal solution will continue to evolve significantly over the next few years. The Gartner Group predicts generation 8 portals to expand on the enterprise mash-up concept of delivering a variety of information, tools, applications and access points through a single mechanism.

With the increase in user generated content, disparate data silo's, and file formats, information architects and taxonomist will be required to allow users the ability to tag (classify) the data. This will ultimately cause a ripple effect where users will also be generating adhoc navigation and information flows.