What is the primary usage of the REST API?

The primary usage of the REST API is centered around mobile and browser applications. This is due to its lightweight nature and the simplicity of using HTTP requests to interact with web services. REST APIs adhere to standard web protocols, making them easily accessible from various platforms, including mobile devices and web browsers. This allows for seamless integration with frontend applications, enabling developers to leverage the API for fetching and sending data quickly and efficiently in user interfaces.

Moreover, REST APIs support a wide range of data formats, most commonly JSON, which is lightweight and easy for applications to parse and generate. This is particularly beneficial for resource-constrained environments, such as mobile devices, where performance and bandwidth are critical considerations.

Overall, while REST APIs can support various data-related operations, their design philosophy and capabilities make them especially well-suited for building mobile and web applications where quick, efficient data access is necessary.