fix description metadata

_config.yml

 email: dev@getmonero.org
 name: Monero
-description: Private. Secure. Untraceable.
+description: Monero is a digital currency that is secure, private, and untraceable.
 keywords: "monero, xmr, bitmonero, cryptocurrency"
 baseurl: ""
 url: "https://getmonero.org"

_includes/head.html

@@ -3,18 +3,8 @@
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width, initial-scale=1">
 
-    <title>
-{% if page.entry %}
-{{ page.entry }} | {% t global.wiki %} | {% t index.page_title %}
-{% elsif tag %}
-{% t global.tags %}: {{ tag.name }} | {% t index.page_title %}
-{% elsif page.title %}
-{{ page.title }} | {% t index.page_title %}
-{% else %}
-{% t index.page_title %}
-{% endif %}
-    </title>
-	<meta name="description" content="{{ site.description }}">
+    <title>{% if page.entry %} {{ page.entry }} | {% t global.wiki %} | {% t index.page_title %} {% elsif tag %} {% t global.tags %}: {{ tag.name }} | {% t index.page_title %} {% elsif page.title %} {{ page.title }} | {% t index.page_title %} {% else %} {% t index.page_title %} {% endif %}</title>
+	<meta name="description" content="{% if page.entry %} {{ page.entry }}: {{ page.summary }} [{% t global.wikimeta %}] {% elsif tag %} {% t global.tagsmeta %}: {{ tag.name }} {% elsif page.meta %} {{ page.meta }} {% elsif page.title %} {{ page.title }} [{% t global.titlemeta %}] {% else %} {{ site.description }} {% endif %}">
 	<meta name="keywords" content="{{ site.keywords }}">
 
     <link href="//static.getmonero.org/css/bootstrap.min.css" rel="stylesheet">

_strings_en.yml

@@ -6,6 +6,9 @@ global:
   monero_project: The Monero Project
   wiki: Moneropedia
   tags: Articles By Tag
+  wikimeta: on Moneropedia, the open encyclopedia of Monero knowledge
+  tagsmeta: All Monero blog articles that are tagged
+  titlemeta: on the home of Monero, a digital currency that is secure, private, and untraceable
   terms: Terms
   privacy: Privacy
   copyright: Copyright

alltags.md

----
-layout: none
----
-
-<pre>
-{% for post in site.posts %}{% for tag in post.tags %}{{ tag }}
-{% endfor %}{% endfor %}
-</pre>