Broadly speaking, this is a Web application framework, which integrates various application systems, data resources and internet resources into an information management platform, provides users with a unified user interface, and establishes information channels from enterprise to customer, enterprise to internal employees, and enterprise to enterprise, allowing enterprises to publish all kinds of information stored inside and outside the enterprise.
Narrow sense: The so-called portal refers to an application system that provides some comprehensive Internet information resources and related information services. The portal initially provided search engines and directory services.