The Web services facilitate various applications to communicate with each other and share data and services among themselves. Other applications can also use the web services. For example, a VB or .NET application can communicate with a Java web services and vice versa. Web services are used to make the application platform and technology independent.

Interoperability in web services refers to the ability of different software systems or components to communicate and exchange data effectively with each other, regardless of their underlying technologies, platforms, or programming languages. In the context of web services, interoperability ensures that services can interact seamlessly across heterogeneous environments, enabling efficient data exchange and integration between various systems. This is typically achieved through adherence to standardized protocols, formats, and communication mechanisms such as XML, JSON, SOAP, and REST, which facilitate interoperability by providing common interfaces and data exchange formats that can be understood and processed by diverse systems. Ultimately, interoperability enhances the flexibility, scalability, and efficiency of web services by enabling seamless integration and communication between disparate systems.