Grails is an open-source programming framework that helps you build dynamic websites and web applications using a Java-like programming language called Groovy. Groovy is the key programming language that finds its use in Grails Web Development. It’s an object oriented programming language with some elements of Java and is ideal for building web applications that run seamlessly on Java Virtual Machine (JVM). Grails framework makes the development process fast and easy. It is comparatively easy to learn and offers some advanced features with Java functionality.

Groovy is a dynamic language and it offers features similar to Ruby, Python, Perl, and Smalltalk. Grails is a high-productivity framework that follows "coding by convention" paradigm and provides a stand-alone development environment which hides configuration details from the developers. Many big software firms like Disney, MTV, Netflix, Sky, LinkedIn, Walmart, ESPN have used Grails for developing their products.