diff --git a/assets/p/serenity-4x.png b/assets/p/serenity-4x.png
new file mode 100644
index 0000000..1988bef
Binary files /dev/null and b/assets/p/serenity-4x.png differ
diff --git a/content/posts/website-best-practices.md b/content/posts/website-best-practices.md
index 30e4072..8cf37ca 100644
--- a/content/posts/website-best-practices.md
+++ b/content/posts/website-best-practices.md
@@ -15,7 +15,9 @@ sitemap:
     ChangeFreq: daily
     Priority: 0.7
 featured: 2
-title: Best practices for inclusive textual websites
+image: "serenity-4x.png"
+image_alt: "Retro-looking web browser with bitmap fonts showing this article's \"code snippet 4\"."
+title: "Best practices for inclusive textual websites"
 ---
 <section role="doc-preface">
 <h2 id="before-you-begin">Before you begin</h2>
diff --git a/content/posts/whatsapp-and-the-domestication-of-users.md b/content/posts/whatsapp-and-the-domestication-of-users.md
index 7718d84..afcfce5 100644
--- a/content/posts/whatsapp-and-the-domestication-of-users.md
+++ b/content/posts/whatsapp-and-the-domestication-of-users.md
@@ -12,6 +12,8 @@ tags:
     - privacy
     - platforms
 featured: 3
+image: "whatsapp_ad_dark.png"
+image_alt: "WhatsApp PR notice describing data not collected; analysis in article."
 title: WhatsApp and the domestication of users
 ---
 <section role="doc-introduction">
@@ -84,13 +86,13 @@ Those of us who were sounding the alarm a few years ago experienced a brief mome
 
 The bait-and-switch operation incurred backlash significant enough for a noticeable minority of users to actually migrate; this number turned out to be slightly more than the rounding error WhatsApp was likely expecting. In response, WhatsApp delayed the change and published an ad to improve its image.
 
-{{<transcribed-image id="whatsapp-ad">}}
+{{<transcribed-image id="whatsapp-notice">}}
 
-#### <span itemprop="name">Whatsapp Ad</span> {#whatsapp-ad-hd}
+#### <span itemprop="name">Whatsapp Ad</span> {#whatsapp-notice-hd}
 
-{{< transcribed-image-figure id="whatsapp-ad" has-transcript="true" >}}
+{{< transcribed-image-figure id="whatsapp-notice" has-transcript="true" >}}
 
-{{< picture name="whatsapp_ad" alt="WhatsApp ad describing data not collected" >}}
+{{< picture name="whatsapp_ad" alt="WhatsApp notice describing data not collected." >}}
 
 <figcaption itemprop="caption">
 
diff --git a/layouts/partials/head.html b/layouts/partials/head.html
index 90f4543..e2ad491 100644
--- a/layouts/partials/head.html
+++ b/layouts/partials/head.html
@@ -56,11 +56,18 @@
 <meta property="og:type" content="article">
 {{- end -}}
 <!-- ANOTHER meta image?! When will it end? -->
-{{ $og_image := resources.Get "/favicon512.png" | resources.Fingerprint "md5" -}}
+{{- $og_image := resources.Get "/favicon512.png" | resources.Fingerprint "md5" -}}
+{{- $og_image_alt := "" -}}<!--Default open graph image is purely decorative and visual, so it should be hidden from assistive technologies.-->
+{{- with .Params.image -}}
+	{{- $og_image = resources.Get (printf "/p/%s" . ) | resources.Fingerprint "md5" -}}
+{{- end -}}
+{{- with .Params.image_alt -}}
+	{{- $og_image_alt = . -}}
+{{- end }}
 {{ printf `<meta property="og:image" content="%s">` $og_image.Permalink | safeHTML }}
 <meta property="og:image:type" content="image/png">
-<meta property="og:image:height" content="512"><meta property="og:image:width" content="512">
-<meta property="og:image:alt" content="White-on-black colon and semicolon">
+<meta property="og:image:height" content="{{ $og_image.Height }}"><meta property="og:image:width" content="{{ $og_image.Width }}">
+<meta property="og:image:alt" content="{{ $og_image_alt }}">
 <meta property="og:url" content="{{ .Site.Params.CanonicalBaseURL }}{{ $canonicalRelPermalink }}">
 <meta property="og:description" content="{{ $description }}">
 {{ hugo.Generator | replaceRE " />" ">" | safeHTML}}