LEMP is a high-performance software stack consisting of Linux, Nginx, MariaDB, and PHP, commonly used to host dynamic websites and web applications. Nginx serves as the web server, handling incoming requests efficiently. MariaDB, a fork of MySQL, provides the database management system, while PHP enables dynamic content generation. This stack is popular for its speed, scalability, and open-source nature. LEMP is widely used for building robust, reliable web environments on Linux-based servers.