The tutorial provider for this course is not specified in the given information. Without more details about the source, it's not possible to write an accurate paragraph about the tutorial provider.
The Groovy and Grails Tutorials cover two related technologies in the Java ecosystem. Groovy is a dynamic programming language for the Java Virtual Machine that offers features like closures, dynamic typing, and metaprogramming. Grails is a web application framework built on top of Groovy that follows the convention-over-configuration paradigm, making it easier to develop web applications quickly.