diff --git a/_config.yml b/_config.yml
index 154387e5..08555e33 100644
--- a/_config.yml
+++ b/_config.yml
@@ -26,8 +26,8 @@ staticman:
 
 # Site logo, image or text
 brand:
-    image:          logo.png  # e.g. logo.png, upload logo image file to /assets/img/ folder
-    text:           Docs      # if the above "logo:" image variable  is not set, this text logo is displayed instead
+    image:         logo.png  # e.g. logo.png, upload logo image file to /assets/img/ folder
+    text:          Docs      # if the above "logo:" image variable  is not set, this text logo is displayed instead
 
 # Default author settings
 author:
@@ -57,7 +57,9 @@ social:
     youtube:
 
 # Twitter share button
-twitter_username:
+twitter:
+  username: blockstack
+  image: /assets/img/touch-icon.png
 
 # Default footer image settings
 footer:
@@ -147,6 +149,7 @@ defaults:
       path: "" # an empty string here means all files in the project
     values:
       comments: true
+      image: /assets/img/touch-icon.png
 
 collections:
   android:
diff --git a/_develop/zero_to_dapp_1.md b/_develop/zero_to_dapp_1.md
index 2bbe19c3..fc77f2c6 100644
--- a/_develop/zero_to_dapp_1.md
+++ b/_develop/zero_to_dapp_1.md
@@ -1,6 +1,7 @@
 ---
 layout: learn
 permalink: /:collection/:path.html
+image: /assets/img/zero-to-dapp.png
 ---
 # 1 - Why Blockchain and Blockstack?
 {:.no_toc}
diff --git a/_develop/zero_to_dapp_2.md b/_develop/zero_to_dapp_2.md
index b64ced84..cf9da712 100644
--- a/_develop/zero_to_dapp_2.md
+++ b/_develop/zero_to_dapp_2.md
@@ -1,6 +1,7 @@
 ---
 layout: learn
 permalink: /:collection/:path.html
+image: /assets/img/zero-to-dapp.png
 ---
 # 2 - Discover how DApps are different
 {:.no_toc}
diff --git a/_develop/zero_to_dapp_3.md b/_develop/zero_to_dapp_3.md
index 8f18bbaa..3ec6b88d 100644
--- a/_develop/zero_to_dapp_3.md
+++ b/_develop/zero_to_dapp_3.md
@@ -1,6 +1,7 @@
 ---
 layout: learn
 permalink: /:collection/:path.html
+image: /assets/img/zero-to-dapp.png
 ---
 # 3 - Build an Animal Kingdom DApp
 {:.no_toc}
diff --git a/_develop/zero_to_dapp_3_win.md b/_develop/zero_to_dapp_3_win.md
index 681b24c0..c41d9479 100644
--- a/_develop/zero_to_dapp_3_win.md
+++ b/_develop/zero_to_dapp_3_win.md
@@ -1,6 +1,7 @@
 ---
 layout: learn
 permalink: /:collection/:path.html
+image: /assets/img/zero-to-dapp.png
 ---
 # 3. Build an Animal Kingdom DApp
 {:.no_toc}
diff --git a/_develop/zero_to_dapp_4.md b/_develop/zero_to_dapp_4.md
index 773602ca..82f7e2f6 100644
--- a/_develop/zero_to_dapp_4.md
+++ b/_develop/zero_to_dapp_4.md
@@ -1,6 +1,7 @@
 ---
 layout: learn
 permalink: /:collection/:path.html
+image: /assets/img/zero-to-dapp.png
 ---
 # 4 - Participate in App Mining
 {:.no_toc}
diff --git a/_includes/head.html b/_includes/head.html
index 30f5ab01..8b318f35 100644
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -4,8 +4,8 @@
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <title>{{ page.title | escape }}</title>
   {% seo title=false %}
-  <!-- <meta property="og:image" content="{% if site.brand.image contains 'http' %}{{ site.brand.image }}{% else %}{{ site.post_assets | absolute_url }}{{ site.brand.image }}{% endif %}"/> -->
-  <meta property="og:image" content="{% if site.brand.image contains 'http' %}{{ site.brand.image }}{% else %}{{ site.post_assets | url }}{{ site.brand.image }}{% endif %}"/>
+  <!-- <meta property="og:image" content="{% if site.brand.image contains 'http' %}{{ site.brand.image }}{% else %}{{ site.post_assets | url }}{{ site.brand.image }}{% endif %}"/> -->
+  <meta property="og:image" content="{{ "/assets/img/touch-icon.png" | relative_url }}"/>
   <link rel="stylesheet" href="{{ "/assets/css/main.css" | relative_url }}">
   <link rel="shortcut icon" type="image/png" href="{{ "assets/img/touch-icon.png" | relative_url }}" >
   <link rel="alternate" type="application/rss+xml" title="{{ site.title | escape }}" href="{{ "/feed.xml" | relative_url }}">
diff --git a/_includes/share.html b/_includes/share.html
index e8e9720e..0a6e312a 100644
--- a/_includes/share.html
+++ b/_includes/share.html
@@ -1,3 +1,3 @@
 <div class="share uk-text-center">
-    <a href="https://twitter.com/intent/tweet?text={{ page.title }}&url={{ site.url }}{{ page.url }}&via={{ site.twitter_username }}&related={{ site.twitter_username }}" rel="nofollow" target="_blank" title="Share on Twitter" onclick="window.open(this.href, 'twitter', 'width=550,height=235');return false;"><span data-uk-icon="icon: twitter; ratio: 1.2"></span></a>
+    <a href="https://twitter.com/intent/tweet?text={{ page.title }}&url={{ site.url }}{{ page.url }}&via={{ site.twitter.username }}&related={{ site.twitter_username }}" rel="nofollow" target="_blank" title="Share on Twitter" onclick="window.open(this.href, 'twitter', 'width=550,height=235');return false;"><span data-uk-icon="icon: twitter; ratio: 1.2"></span></a>
 </div>
diff --git a/assets/img/logo.png b/assets/img/logo.png
new file mode 100644
index 00000000..4b1793c8
Binary files /dev/null and b/assets/img/logo.png differ
diff --git a/assets/img/zero-to-dapp.png b/assets/img/zero-to-dapp.png
new file mode 100644
index 00000000..93ea51f7
Binary files /dev/null and b/assets/img/zero-to-dapp.png differ
diff --git a/robots.txt b/robots.txt
new file mode 100644
index 00000000..66339251
--- /dev/null
+++ b/robots.txt
@@ -0,0 +1,5 @@
+# www.robotstxt.org/
+# www.google.com/support/webmasters/bin/answer.py?hl=en&answer=156449
+
+User-agent: *
+Sitemap: https://docs.blockstack.org/sitemap.xml