RESTful Services are a set of architectural principles used for designing networked applications. They rely on stateless communication and standard HTTP methods like GET, POST, PUT, and DELETE to perform operations on resources identified by URLs. These services enable seamless interaction between clients and servers, allowing for the exchange of data in a lightweight and efficient manner. By adhering to the principles of Representational State Transfer, RESTful Services promote scalability and flexibility, making them a popular choice for modern web applications.