Lighttpd is a free and open-source web server designed to be fast and efficient. It is particularly well-suited for serving static content, such as images and HTML files, making it a popular choice for high-traffic websites. With a small memory footprint, Lighttpd can handle many simultaneous connections, which helps improve website performance. One of the key features of Lighttpd is its ability to support various web technologies, including PHP and FastCGI. This flexibility allows developers to create dynamic web applications while maintaining speed and reliability. Overall, Lighttpd is a great option for those looking to optimize their web server experience.