Zend Server is a robust application server designed specifically for running PHP applications. It provides a comprehensive environment that includes tools for debugging, monitoring, and optimizing PHP code, making it easier for developers to build and maintain high-performance web applications. In addition to its core features, Zend Server offers support for various frameworks and libraries, enhancing its versatility. It also includes built-in security features to help protect applications from vulnerabilities, ensuring that developers can deploy their projects with confidence. Overall, Zend Server streamlines the development process and improves application reliability.