A reverse proxy in web applications functions as an intermediary between users and web servers. It receives client requests and forwards them to the appropriate backend server, effectively hiding the server's identity and enhancing security. This configuration can improve load balancing by distributing requests across multiple servers, thereby optimizing resource use and reducing downtime. Additionally, reverse proxies enable caching, which enhances response times for frequently accessed content. By absorbing HTTPS traffic, they also simplify SSL/TLS management. Overall, reverse proxies enhance performance, scalability, and security for web applications, benefiting both users and administrators.