A reverse proxy is a server that sits between client devices and backend servers, forwarding client requests to the appropriate backend servers and returning the responses to the clients.

Reverse proxies play a critical role in optimizing the performance, scalability, security, and reliability of web applications and services by serving as intermediaries between clients and backend servers. They enable efficient and flexible request routing, load balancing, caching, and security enforcement, enhancing the overall user experience and system resilience.