diff --git a/README.md b/README.md
index f2e841f..2d11b2f 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,5 @@
-# US - User Switcher
+# US - User {Switcher,Shell}
+
+Opens a shell as a different user without needing to authenticate as that user.
+This is similar to the behavior of `su` but it allows to execute privileged
+and/or commands as any other user without needing their password.