diff --git a/docs/assets/scss/_styles_project.scss b/docs/assets/scss/_styles_project.scss
index 00a7680e9c..bcbc4d7734 100644
--- a/docs/assets/scss/_styles_project.scss
+++ b/docs/assets/scss/_styles_project.scss
@@ -19,6 +19,7 @@
 .headline {
     font-size: 1.5rem;
     font-weight: 600;
+    line-height: 1.5;
     margin-bottom: 25px;
 }
 
diff --git a/docs/content/en/_index.html b/docs/content/en/_index.html
index 065e98c006..4932bca61f 100644
--- a/docs/content/en/_index.html
+++ b/docs/content/en/_index.html
@@ -1,14 +1,15 @@
 +++
 title = "PipeCD"
 linkTitle = "PipeCD"
+description = "PipeCD is a GitOps style continuous delivery platform that provides a consistent deployment and operations experience for Kubernetes, Terraform, Cloud Run, AWS Lambda, Amazon ECS, and more."
 
 +++
 
 {{< blocks/cover height="med" image_anchor="top" color="primary" >}}
 <div class="container">
-    <p class="headline">
+    <h1 class="headline">
         The One CD for All {applications, platforms, operations}
-    </p>
+    </h1>
     <p class="h5 long-description">
         A GitOps style continuous delivery platform that provides <br/> consistent deployment and operations experience for any application.
     </p>
diff --git a/docs/layouts/partials/footer.html b/docs/layouts/partials/footer.html
index 441dd24f01..e55f0cc6e8 100644
--- a/docs/layouts/partials/footer.html
+++ b/docs/layouts/partials/footer.html
@@ -4,13 +4,14 @@
 {{ $text_color := "text-white" }}
 {{ if .IsHome }} {{ $text_color = "text-dark" }} {{ end }}
 {{ $cncf_logo := "https://www.cncf.io/wp-content/uploads/2022/05/CNCF_logo_white.svg" }}
-{{ if .IsHome }} {{ $cncf_logo = "https://www.cncf.io/wp-content/uploads/2022/07/cncf-color-bg.svg" }} {{ end }}
+{{ $cncf_logo_height := "40" }}
+{{ if .IsHome }} {{ $cncf_logo = "https://www.cncf.io/wp-content/uploads/2022/07/cncf-color-bg.svg" }} {{ $cncf_logo_height = "48" }} {{ end }}
 <div class="{{ $bg_color }} row d-print-none">
   <div class="container-fluid py-3 mx-sm-5">
     <div class="row">
       <div class="col-8 py-3 order-sm-2 {{ $text_color }}">
         <a href="https://www.cncf.io/projects/pipecd/" target="_blank">
-          <img src="{{ $cncf_logo }}" alt="cncf logo" width="250">
+          <img src="{{ $cncf_logo }}" alt="cncf logo" width="250" height="{{ $cncf_logo_height }}" style="height: auto;">
           <div class="py-2 {{ $text_color }}">PipeCD is a Cloud Native Computing Foundation sandbox project.</div>
         </a>
       </div>
diff --git a/docs/layouts/partials/head.html b/docs/layouts/partials/head.html
index a33a25a0ec..e87307b4ad 100644
--- a/docs/layouts/partials/head.html
+++ b/docs/layouts/partials/head.html
@@ -11,6 +11,12 @@
 {{ end -}}
 {{ partialCached "favicons.html" . }}
 <title>{{ if .IsHome }}{{ .Site.Title }}{{ else }}{{ with .Title }}{{ . }} | {{ end }}{{ .Site.Title }}{{ end }}</title>
+<!-- for search engine optimization -->
+{{ $description := .Page.Description }}
+{{ if not $description }}{{ $description = .Page.Summary | plainify | truncate 150 }}{{ end }}
+{{ if $description }}
+<meta name="description" content="{{ $description }}">
+{{ end }}
 {{- template "_internal/opengraph.html" . -}}
 {{- template "_internal/schema.html" . -}}
 {{- template "_internal/twitter_cards.html" . -}}
diff --git a/docs/layouts/shortcodes/blocks/value.html b/docs/layouts/shortcodes/blocks/value.html
index 2bb8512672..58fd33f72a 100644
--- a/docs/layouts/shortcodes/blocks/value.html
+++ b/docs/layouts/shortcodes/blocks/value.html
@@ -1,5 +1,6 @@
 {{ $_hugo_config := `{ "version": 1 }` }}
 {{ $value_image := resources.GetMatch (printf "**%s*" .Params.image) }}
+{{ $value_title := .Params.title }}
 
 <div class="row justify-content-center core-value {{ if eq .Params.image_position "right" }} flex-row-reverse {{ end }} border-bottom">
 
@@ -19,6 +20,7 @@
               {{ $image_resized_750.RelPermalink }} 1.5x,
               {{ $image_resized_1000.RelPermalink }} 2x,
               {{ $image_resized_1500.RelPermalink }} 3x"
+      alt="{{ $value_title }}"
       data-zoom-src="{{ $image_resized_zoom.RelPermalink }}"
       data-zoomable
     />