What component is necessary for customizing a checkout process in Salesforce Commerce Cloud?

The checkout controller and ISML templates are essential for customizing the checkout process in Salesforce Commerce Cloud. The checkout controller is responsible for handling the logic and flow of the checkout process, such as managing customer interactions, processing payments, and ensuring that the flow complies with the expected user experience. This controller acts as the backbone that connects various components within the checkout process.

ISML (Interpreted Server-side Markup Language) templates are integral to defining the user interface of the checkout pages. They allow developers to create dynamic and responsive web pages that present data to the customer and capture their inputs as they progress through the checkout steps. Customizing these templates enables developers to align the checkout experience with the brand and improve user satisfaction.

Together, the checkout controller and ISML templates provide the necessary tools to create a tailored checkout experience, allowing businesses to implement specific requirements or enhancements that suit their operational needs and customer preferences.