What Does Portal (Internet) Mean?

In the context of the Internet, a portal is refers to any commonly used website serving as an entry point to the Internet, usually with many links to a wide variety of information, data, resources and services.

Techopedia Explains Portal (Internet)

During the dotcom boom the term portal was a buzzword popularized by a number of companies trying to define their Internet offerings. Wall Street liked the term and picked it up. At the time, it became fashionable to call your web offerings a portal, and many websites branded themselves as such. While some sites, like Yahoo, survived the bust, other portals such as Excite or Lycos did not fare well.