RStudio is an Integrated Development Environment or IDE for R language. It is one of the most popular IDEs for R and provides a console, editor, tools for debugging, plotting, and managing the workspace. One of the main reasons for its popularity is that it has two editions available in the market- open source and commercial which makes it convenient for the user to build projects using it without paying anything. On top of that, you can even use it without downloading the start-up using its browser version.