If is home then insert meta description

layouts/partials/head.html

@@ -6,6 +6,12 @@
   {{ .Hugo.Generator }}
   <link rel="canonical" href="{{ .Permalink }}">
 
+  {{ if .IsHome }}
+    {{ with .Site.Params.description }}
+      <meta name="description" content="{{ . | plainify }}">
+    {{ end }}
+  {{ end }}
+
   <link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
   <link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png">
   <link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png">