Which of the following is a good use case for a Site Property?

A Site Property in OutSystems is used to define application-level variables that need to be accessible across different elements of the application and remain consistent throughout the application's lifecycle. These properties are particularly useful for settings or constants that may vary by environment (development, testing, production) but are essential for the functioning of the application.

Utilizing a Site Property for a REST Web Service API Key is an ideal use case because this key often needs to be securely stored and accessed from multiple places within the application. By using a Site Property, developers can ensure that the API key can be easily changed without having to modify the application’s logic, allowing for smoother transitions between different environments or API versions. Additionally, keeping sensitive information like API keys in Site Properties allows for better security practices, such as restricting access to this sensitive data.

In contrast, other options such as the Current user ID or Total Stock Quantity of Products are typically user-specific or context-specific data and are better suited to be managed within user sessions or aggregate entities rather than as Site Properties. Similarly, a Search Keyword is largely dynamic and can change frequently within user sessions, making it inappropriate for a static Site Property. Thus, the use of a Site Property for an API key aligns with best practices for managing consistent,