What is a Portlet in the context of Liferay?

In the context of Liferay, a Portlet is defined as a web component that generates dynamic content. Portlets are essentially reusable, independent components that can be added to a web page, typically within a portal environment. They serve as the building blocks for creating a rich user experience by providing various functionalities, such as displaying content, capturing user input, and facilitating interaction with different services.

When integrated into a Liferay portal, each Portlet operates within its own execution environment, allowing for multiple Portlets to coexist on a single web page while maintaining their separation of functions. This modular nature enables developers to compose complex applications by leveraging various Portlets that contribute distinct capabilities, thus enhancing the overall functionality and interactivity of the portal.

The other options, while they describe certain aspects of web development, do not accurately characterize the primary role of a Portlet within Liferay. A Portlet is specifically focused on generating and managing dynamic content rather than being tied to database integration or backend data processing.