Grails is an open-source web framework that makes developing modern web applications much easier. It is based on the Groovy programming language which makes it easy to learn and use. Grails is an ideal choice for developing high-performance web applications that need scalability and maintainability. It also provides a rapid development platform with features like object-oriented programming, dynamic typing, and a powerful plugin system. Moreover, Grails offers support for popular web technologies such as HTML, CSS, and JavaScript. With Grails, developers can quickly create robust web applications with excellent user experiences. Grails is an invaluable tool for any developer looking to create modern web applications.