Studio is the building tool of Roblox that helps you to create the places of your dreams. It provides our Developers with a more comprehensive and intricate set of tools, which allows for a greater sense of control and creative expression.
Roblox Studio's features are accessible to a variety of skill levels ranging from a novice to an experienced programmer. Tools range from simple manipulation of objects or terrain, to entering complex scripts and game functions. Studio also allows you to test your games in an isolated environment before uploading them to the Roblox website.
Additional Help
Roblox Wiki (Tutorials and Info)
Roblox Blog Articles
Part 1 - 3 Tips to Make You a Better Builder