diff --git a/site/_data/project.yml b/site/_data/project.yml
index 00c2b47..8d27ae4 100644
--- a/site/_data/project.yml
+++ b/site/_data/project.yml
@@ -20,7 +20,7 @@
 unix_name: MarvinAI
 incubator_name: incubator-marvin
 incubator_slash_name: incubator/marvin
-description: Apache MarvinAI is a distributed and declarative machine learning platform.
+description: Apache MarvinAI is a platform for machine learning operations (ML-Ops)
 
 download: /marvin-platform-book/ch2_toolbox_installation/overview
 
diff --git a/site/_includes/themes/apache/_navigation.html b/site/_includes/themes/apache/_navigation.html
index 3a41e43..5595a03 100644
--- a/site/_includes/themes/apache/_navigation.html
+++ b/site/_includes/themes/apache/_navigation.html
@@ -7,8 +7,8 @@
             <span class="icon-bar"></span>
             <span class="icon-bar"></span>
           </button>
-          <a class="navbar-brand" href="{{ BASE_PATH }}">
-            <img src="/assets/themes/apache/img/logo.png" width="200">
+          <a class="navbar-brand" href="/">
+            <img src="/assets/themes/apache/img/logo.png" width="80">
           </a>
         </div>
         <nav class="navbar-collapse collapse" role="navigation">
@@ -20,6 +20,7 @@
                 <li><a href="/community-members">Who we are</a></li>
                </ul>
             </li>
+            <li><a href="/marvin-platform-book/SUMMARY">Document</a></li>
             <li><a href="{{ site.data.project.source_repository_mirror }}">GitHub</a></li>
             <li id="apache">
               <a href="#" data-toggle="dropdown" class="dropdown-toggle">Apache<b class="caret"></b></a>