Merge pull request #304 from coderoad/why

Explain why CodeRoad exists

Author: ShMcK

Diff for: README.md

@@ -8,6 +8,16 @@ CodeRoad is a VSCode extension that allows you to play interactive coding tutori
 
 ![CodeRoad Image](./docs/images/tutorial-example.png)
 
+## Why
+
+Interactive learning is the most effective way to gain new skills and knowledge. CodeRoad aims to help tutorial creators develop and share interactive content with the community.
+
+For learners, there are a number of advantages to running tutorials inside VSCode:
+- learn in a real world coding environment
+- get rapid feedback on save and helpful error messages
+- users own the code, and can build a Git timeline and deploy a portfolio
+
+
 ## Getting Started
 
 ### Start