What is grails?
According to grail documentation
Grails is a full stack framework and attempts to solve as many pieces of the web development puzzle through the core technology.
What are the built-in features of Grails?
It is easy with built-in Object Relational Mapping (ORM) using Hibernate
Cool view technology:
Similar to JSP groovy has Groovy Server Pages (GSP)
Integrated Spring MVC
An interactive command line environment and build system based on Gradle
Servlet container: Has embedded Tomcat container with hot loading feature.
Support for internationalization (i18n) built on Spring
A transactional service layer built on Spring’s transaction abstraction
All of these are made easy to use through the power of the Groovy language and the extensive use of Domain Specific Languages (DSLs)