How do you define a custom action in Salesforce B2C Commerce?

Defining a custom action in Salesforce B2C Commerce is accomplished by creating a custom controller with appropriate logic. This approach allows developers to implement specific business rules and functionalities tailored to their unique requirements. Custom controllers are an integral part of the site’s architecture, enabling the integration of controllers that interact with models and facilitate processing according to the needs of the e-commerce application.

Building a custom controller provides the flexibility necessary to customize standard functionalities or introduce entirely new actions that cater to distinct use cases. Such controller logic can include various operations, from handling user input to providing responses that enhance customer interaction.

The other choices do not fully capture the essence of creating custom actions. Modifying configuration files often involves changes to settings and parameters but does not directly correspond to defining new actions. Relying solely on pre-defined actions limits the ability to innovate or address specific business needs, while editing built-in controllers can lead to complications and is not typically recommended, as it may interfere with system updates or maintenance. Hence, leveraging custom controllers is the most effective method to define custom actions in Salesforce B2C Commerce.