What is APIs RESTfull?

RESTful APIs (Representational State Transfer) are an architectural style for designing networked applications. They rely on a stateless, client-server communication protocol, typically HTTP. RESTful APIs define a set of constraints for how the API should behave, including using standard HTTP methods (GET, POST, PUT, DELETE) to perform operations on resources, identified by URLs. They are commonly used for building web services, mobile applications, and integrating different systems because of their simplicity, scalability, and interoperability.