Update README.md

Author: saracope

README.md

@@ -5,7 +5,10 @@ A [.pdf of the slides](https://github.com/saracope/github-techtalk/blob/master/g
 
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 # Title: Get to Know Version Control with GitHub
-### Description: This talk is meant as a friendly introduction to version control and GitHub.
+### Description: 
+Version control software allows multiple people to manage changes to a project at the same time without getting in each other’s way. At GSA, we use it to help share and collaborate on open source software but it can be used for many other things as well. 
+
+In this session, we’ll talk about the basics of version control, look at how you might use it on your projects and take a tour of the GitHub ecosystem. This is a beginners session and no coding experience is required.
 
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