Which of the following correctly describes the role of a web block in OutSystems?

The role of a web block in OutSystems is accurately described as a reusable UI component. Web blocks are designed to encapsulate user interface elements, allowing developers to create modular components that can be reused across different screens or applications. This modularity promotes consistency in design and functionality, as the same web block can be utilized multiple times within a project without the need to duplicate code.

By using web blocks, developers can streamline the development process, reduce redundancy, and enhance maintainability. For example, if a specific header or footer component is needed on multiple pages, it can be defined as a web block, ensuring that any updates made to it are automatically reflected wherever the block is used.

In this context, the other options describe functionalities that do not align with the specific purpose of a web block. While some elements of a web application may involve data handling or navigation, those responsibilities are typically associated with other components or services in the OutSystems platform.