Update README.md

README.md

@@ -1,10 +1,18 @@
 # PyTeal
 
 [![Build Status](https://travis-ci.com/algorand/pyteal.svg?token=B9eSse5TZikdgKBemvq3&branch=master)](https://travis-ci.com/algorand/pyteal)
+[![Documentation Status](https://readthedocs.org/projects/pyteal/badge/?version=latest)](https://pyteal.readthedocs.io/en/latest/?badge=latest)
 
-Python Language Binding for Teal
+PyTeal is a Python Language Binding for Algorand's Smart Contracts (ASC1s). 
 
-This code **hasn't been audited**. Use it at your own risk.
+Algorand Smart Contracts are implemented using a new language that is stack-based and created by Algorand, 
+called [Transaction Execution Approval Language (TEAL)](https://developer.algorand.org/docs/teal). 
+This a non-Turing complete language that allows branch forwards but prevents recursive logic 
+to maximize safety and performance. 
+
+PyTeal allows Algorand Smart Contracts developers express there smart contract logic purely using Python. It provides higher level functional programming style abstactions over TEAL and does type checking at construction time.
+
+PyTeal **hasn't been security audited**. Use it at your own risk.
 
 ### Install