diff --git a/README.md b/README.md
index 437c9be..434d2c0 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,12 @@
-docker-nginx
+Docker-Nginx
 ============
 
 A simple Nginx image for Docker to serve static websites. It will serve anything in the directory `/var/www`.
 
+# What is Docker?
+Docker is a set of platform as a service products that use OS-level virtualization to deliver software in packages called containers.
+
+
 You'll need to use a `Dockerfile` to build an image with your site in it. For example, if your site is in a directory called `src/`, you could create this `Dockerfile`:
 
     FROM orchardup/nginx