diff --git a/locales/en.yml b/locales/en.yml
index 0d66c5c548..03d5306d3e 100644
--- a/locales/en.yml
+++ b/locales/en.yml
@@ -1,4 +1,6 @@
 common:
+  misskey: "Note everything and share it others using Misskey."
+
   time:
     unknown: "unknown"
     future: "future"
diff --git a/locales/ja.yml b/locales/ja.yml
index 023bac4d47..b640f0f248 100644
--- a/locales/ja.yml
+++ b/locales/ja.yml
@@ -1,4 +1,6 @@
 common:
+  misskey: "Misskeyに何でも投稿して皆と共有しましょう。"
+
   time:
     unknown: "なぞのじかん"
     future: "未来"
diff --git a/src/web/app/init.js b/src/web/app/init.js
index 2ddb66b3e7..cb661c2595 100644
--- a/src/web/app/init.js
+++ b/src/web/app/init.js
@@ -2,7 +2,7 @@
  * App initializer
  */
 
-"use strict";
+'use strict';
 
 import * as riot from 'riot';
 import api from './common/scripts/api';
@@ -21,6 +21,14 @@ require('./common/tags');
 
 console.info(`Misskey v${VERSION} (葵 aoi)`);
 
+{ // Set description meta tag
+	const head = document.getElementsByTagName('head')[0];
+	const meta = document.createElement('meta');
+	meta.setAttribute('name', 'description');
+	meta.setAttribute('content', '%i18n:common.misskey%');
+	head.appendChild(meta);
+}
+
 document.domain = CONFIG.host;
 
 // Set global configuration