What is the function of an activity in Pega?

The function of an activity in Pega is to perform a series of actions. Activities are fundamental building blocks in Pega that consist of a sequence of steps or actions designed to manipulate data, interact with other systems, or manage cases within the application. They can include tasks such as updating a property, calling a data page, or executing a flow.

Activities allow developers to encapsulate complex logic into reusable components, ensuring that the same processes can be executed consistently throughout the application. This centralizes logic and improves maintainability because if changes need to be made, they can be done in one place, and all instances that utilize that activity automatically reflect the updates.

In contrast to the other options, case types are defined through case management features, user interface layouts are created using section rules and harnesses, and data connectivity involves integrating with external systems through data sources or connectors. Each of these plays a significant role in building an application in Pega, but the specific purpose of an activity is to execute a range of programmed actions.