Description: Scalability in RESTful architectures refers to the ability of a system to handle an increase in workload without compromising performance. In the context of REST (Representational State Transfer), which is an architectural style for designing web services, scalability is achieved through the separation of concerns and the use of identifiable resources. This means that RESTful systems can be scaled horizontally by adding more servers to distribute the load, or vertically by enhancing the capacity of existing servers. Scalability is crucial for applications that experience traffic variations, such as web applications or cloud services, where demand can fluctuate dramatically. Additionally, the stateless nature of REST allows each client request to be independent, facilitating load distribution across multiple servers. In summary, scalability in REST is a critical aspect that enables applications to adapt to changing user needs and maintain optimal performance as they grow.