diff --git a/README.md b/README.md
index 404bd5acd..ff203a2c9 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,9 @@
-# Calling Python from Javascript with value conversion
+# Pyodide
+
+This provides an integration layer when running an empscripten-compiled CPython
+inside a web browser. It provides transparent conversion of objects between
+Javascript and Python and a sharing of global namespaces. When inside a browser,
+this means Python has full access to the Web APIs.
 
 # Building