What defines "Sitecore Headless" functionality?

"Sitecore Headless" functionality is defined by its ability to support content delivery via APIs. This approach enables developers to use Sitecore as a backend content management system while leveraging various front-end technologies, frameworks, and channels to display the content. By utilizing APIs, site content can be dynamically retrieved and rendered in a way that is independent from the Sitecore interface, thereby allowing for greater flexibility in how content is presented across different platforms, such as mobile apps, single-page applications, or multi-channel environments.

The focus on API-based delivery enhances the decoupled architecture that defines headless systems, allowing for more innovative user experiences and a more efficient development process as different teams can work on the front end and back end independently. This aspect is what distinctly characterizes Sitecore's headless capabilities, making it a desirable feature for modern web development.