diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,3 +1,9 @@
-Live version: [slidetogether.io](https://slidetogether.io/)
+## No more "Next Slide Please"
-[Presentation machine client](present/present.py)
+[slidetogether.io](https://slidetogether.io/) is a service for controlling a single presentation from multiple remote computers. Think of is as a presentation remote that works across the Internet.
+
+The presentation computer runs a [Python client](present/present.py) which injects keystrokes. It is limited to standard presentation remote keystrokes (left & right arrows) to minimize security issues.
+
+Remote presenters send commands from a web browser. One or more administrators control which presenters can send commands at any time.
+
+SlideTogether is divided into "rooms". Rooms are entirely separate, with different presentation computers, presenters, and administrators. When you visit [slidetogether.io](https://slidetogether.io/), you are redirected into a new room. You can copy & paste the URL into meeting invites. The first person in the room is an administrator; all others default to optional presenters who have to be enabled by the administrator.
diff --git a/static/index.html b/static/index.html
index 3081cd0..f2b291a 100644
--- a/static/index.html
+++ b/static/index.html
@@ -1,7 +1,7 @@
- Slide Together
+ SlideTogether