What is grails and in order that is it used?

Hi,

I have worked in some J2EE projects, what is Grails and how can it help me in a web development Environment?

Thanks

From the Grails web site:

Grails aims to bring the "coding by convention" paradigm to Groovy. It's an open-source web application framework that leverages the Groovy language and complements Java Web development. You can use Grails as a standalone development environment that hides all configuration details or integrate your Java business logic. Grails aims to make development as simple as possible and hence should appeal to a wide range of developers not just those from the Java community.

http://www.grails.org/