REST APIs (Representational State Transfer Application Programming Interfaces) enable different software systems and applications to communicate and exchange data over HTTP using standardized methods such as GET, POST, PUT, PATCH, and DELETE. They provide a flexible and reliable way to connect websites, web applications, mobile apps, databases, and third-party services.

With structured endpoints, commonly JSON-based data exchange, and stateless communication, REST APIs support features such as user authentication, payment processing, data synchronization, content delivery, and integration with external platforms. They help businesses connect existing systems, automate workflows, and build scalable digital solutions while keeping frontend interfaces and backend services independent, maintainable, and easier to extend.