A headless application is a software application that operates without a graphical user interface (GUI). Instead of interacting with the application through a traditional GUI, users interact with the application through a command-line interface, a web API, or some other means of remote communication.
Headless applications are often used in server-side or backend contexts, where a GUI is not necessary or desired. They can also be used to create custom integrations or to automate tasks and processes. Headless applications can be developed in any programming language, and can run on a variety of platforms, including servers, cloud environments, and IoT devices.
