Addition of meta description

index.html

@@ -4,6 +4,7 @@
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width,initial-scale=1">
     <title>30 Seconds of CSS</title>
+    <meta name="description" content="A curated collection of useful CSS snippets you can understand in 30 seconds or less. From foundational elements such as clearfix to gradient text color and gradient cursor tracking to CSS easing and far beyond.">
     <link rel="icon" type="image/png" sizes="32x32" href="./favicon-32x32.png">
     <script src="./src/js/index.js" defer=""></script>
     <script async="" defer="" src="https://buttons.github.io/buttons.js"></script>