diff --git a/README.md b/README.md
index 9122637..d327d95 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,7 @@ Below are the essential tags for basic, minimalist websites:
 <meta charset="utf-8">
 <meta http-equiv="x-ua-compatible" content="ie=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1">
+<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
 <title>Page Title</title>
 ```