diff --git a/output/apple-touch-icon.png b/output/apple-touch-icon.png
new file mode 100644
index 0000000..8453899
Binary files /dev/null and b/output/apple-touch-icon.png differ
diff --git a/output/favicon.ico b/output/favicon.ico
new file mode 100644
index 0000000..e279aab
Binary files /dev/null and b/output/favicon.ico differ
diff --git a/output/index.css b/output/index.css
index 82dcbd1..e8ea8d3 100644
--- a/output/index.css
+++ b/output/index.css
@@ -54,6 +54,16 @@ body {
 	height: 100%;
 }
 
+.h2-like {
+	display: block;
+    font-size: 1.5em;
+    margin-top: 0.83em;
+    margin-bottom: 0.83em;
+    margin-left: 0;
+    margin-right: 0;
+    font-weight: bold;
+}
+
 #toggle-theme-switch {
 	display: none;
 }
@@ -304,6 +314,12 @@ header {
 	--row-color: var(--secondary-color-shaded);
 }
 
+#tbl_communities h2 {
+	font-size: inherit;
+	margin: inherit;
+	font-weight: inherit;
+	display: inherit;
+}
 /* Particular columns */
 
 .td_identifier {
diff --git a/output/robots.txt b/output/robots.txt
new file mode 100644
index 0000000..e2acced
--- /dev/null
+++ b/output/robots.txt
@@ -0,0 +1,7 @@
+User-agent: *
+Allow: /
+Allow: /about.html
+Allow: /donate.html
+Allow: /index.html
+Allow: /instructions.html
+Allow: /privacy.html
diff --git a/php/generate-html.php b/php/generate-html.php
index 6b7aca7..efe7254 100644
--- a/php/generate-html.php
+++ b/php/generate-html.php
@@ -55,6 +55,8 @@
 				exit(255);
 			}
 
+			$output = preg_replace("/\\t+/", "\t", $output);
+
 			file_put_contents($docpath, join("\n", $output));
 		}
 
diff --git a/sites/+components/communities-json-ld.php b/sites/+components/communities-json-ld.php
index d245ce5..f88ded5 100644
--- a/sites/+components/communities-json-ld.php
+++ b/sites/+components/communities-json-ld.php
@@ -1,4 +1,5 @@
 <?php
+	require_once '+getenv.php';
 	require_once 'php/assets/room-icons.php';
 
 	/**
@@ -6,18 +7,18 @@
 	 */
 
 	$json_ld_data = array(
-		'@context' => 'https://www.w3.org/ns/activitystreams',
+		'@context' => 'https://schema.org/',
 		'summary' => 'Active Session Communities',
-		'type' => 'Collection',
+		'@type' => 'Collection',
 		'totalItems' => count($rooms),
 		'items' => array_map(function(CommunityRoom $room) {
 			$values = array(
-				'type' => 'Group',
+				'@type' => 'Group',
 				'name' => $room->name,
 				'summary' => $room->description,
 				'startTime' => $room->created ? date('Y-m-d\TH:i:s', intval($room->created)) : null,
 				'url' => $room->get_preview_url(),
-				'icon' => room_icon($room, '64x64')
+				'icon' => $SITE_CANONICAL_URL . '/' . room_icon($room, '64x64')
 			);
 			return array_filter($values, function ($value) {
 				return $value != null;
@@ -27,6 +28,6 @@
 ?>
 
 <script type="application/ld+json">
-	<?=json_encode($json_ld_data)?>
+	<?=preg_replace("\\/", "/", json_encode($json_ld_data))?>
 
 </script>
diff --git a/sites/+components/page-head.php b/sites/+components/page-head.php
index a9b51bf..1548e91 100644
--- a/sites/+components/page-head.php
+++ b/sites/+components/page-head.php
@@ -11,3 +11,5 @@
 		form-action 'none'; base-uri 'self';
 	"
 >
+<link rel="apple-touch-icon" href="./apple-touch-icon.png">
+<meta name="robots" content="index, follow">
diff --git a/sites/+components/qr-modals.php b/sites/+components/qr-modals.php
index ba7ff74..2b06afd 100644
--- a/sites/+components/qr-modals.php
+++ b/sites/+components/qr-modals.php
@@ -23,12 +23,14 @@
 							width="64"
 							height="64"
 							data-hydrate-with="icon:src;icon_safety:data-icon-safety"
-						/></div><h1><a
+							alt="Community icon"
+						/></div><a
 							id="details-modal-community-name"
+							class="h2-like"
 							data-hydrate-with="name;preview_link:href"
 							title="Open preview in new tab"
 							href="#"
-						></a></h1>
+						></a>
 					</div>
 					<p id="details-modal-description">
 						<span id="details-modal-description-inner" data-hydrate-with="description"></span>
@@ -72,6 +74,7 @@
 						title="Community join link encoded as QR code"
 						width="512"
 						height="512"
+						alt="Community join link encoded as QR code"
 					>
 					<div id="details-modal-qr-code-label">
 						Scan QR code in Session to join
diff --git a/sites/+components/tbl-communities.php b/sites/+components/tbl-communities.php
index dd100b8..ae7c932 100644
--- a/sites/+components/tbl-communities.php
+++ b/sites/+components/tbl-communities.php
@@ -96,11 +96,11 @@
 				class="td_name-inner"
 				target="_blank"
 				title="Click here to preview '<?=$name?>'"
-				rel="noopener noreferrer"
+				rel="noopener noreferrer external nofollow"
 				itemprop="name"
-			><?=
+			><h2><?=
 				$name
-			?></a>
+			?></h2></a>
 			<span class="room-labels-container">
 <?php foreach ($room->get_room_tags() as $tag): if (CommunityTag::is_showcased_tag($tag->text)): ?>
 				<span
@@ -128,7 +128,7 @@
 				href="<?=$preview_link?>"
 				title="Click here to preview '<?=$name?>'"
 				target="_blank"
-				rel="noopener noreferrer nofollow"
+				rel="noopener noreferrer external nofollow"
 			>
 				<span class="protocol-indicator"></span>
 			</a>
@@ -144,7 +144,7 @@
 					width="36"
 					height="41"
 					src="qrcode-solid.svg"
-					alt="Pictogram of a QR code"
+					alt="QR code pictogram linking to '<?=$name?>' Community QR code"
 					title="Click here to view the details for '<?=$name?>'"
 				>
 			</a>
@@ -171,7 +171,7 @@
 					title="Right click and copy this link to join '<?=$name?>'."
 					href="<?=$join_link?>"
 					rel="external nofollow"
-				>Copy this</a>
+				>Copy this<span class="hidden">link to join '<?=$name?>'.</span></a>
 			</div>
 		</td>
 	</tr>
diff --git a/sites/about.php b/sites/about.php
index 8181ea9..8d27583 100644
--- a/sites/about.php
+++ b/sites/about.php
@@ -9,7 +9,14 @@
 	<link rel="canonical" href="<?=$SITE_CANONICAL_URL?>/about.html">
 	<meta name="viewport" content="width=device-width, initial-scale=1.0">
 	<link rel="stylesheet" href="css/common-dark.css">
+	<meta name="description" content="Learn more about sessioncommunities.online, the online self-updating list of Session Communities.">
 	<title>About — sessioncommunities.online</title>
+	<meta property="og:title" content="About — sessioncommunities.online">
+	<meta property="og:description" content="Session Communities are public chatrooms accessible from within Session Messenger. <?php
+?>This web project crawls known sources of Session Communities, and <?php
+?>displays information about them as a static HTML page.">
+	<meta property="og:type" content="article">
+	<meta property="og:url" content="<?=$SITE_CANONICAL_URL?>/about.html">
 </head>
 <body>
 <h1 id="self-updating-list-of-session-communities"><a href="./">Self-updating list of Session Communities</a></h1>
diff --git a/sites/donate.php b/sites/donate.php
index d32fbcb..23a3f28 100644
--- a/sites/donate.php
+++ b/sites/donate.php
@@ -17,6 +17,15 @@
 
 	<link rel="canonical" href="<?=$SITE_CANONICAL_URL?>/donate.html">
 	<link rel="stylesheet" href="css/common-dark.css">
+	<meta name="description" content="<?php
+	?>Support sessioncommunities.online development with donations if you have disposable income. <?php
+	?>We develop sessioncommunities.online to support the privacy mission.">
+	<meta property="og:title" content="Donate — sessioncommunities.online">
+	<meta property="og:description" content="<?php
+	?>sessioncommunities.online relies on donations for development and server costs. <?php
+	?>Help us redefine what it means to be sustainable and support our mission of improving the Session ecosystem!">
+	<meta property="og:type" content="article">
+	<meta property="og:url" content="<?=$SITE_CANONICAL_URL?>/donate.html">
 	<title>Donate — sessioncommunities.online</title>
 	<style>
 		h1 {
diff --git a/sites/index.php b/sites/index.php
index 3194cb0..8323491 100644
--- a/sites/index.php
+++ b/sites/index.php
@@ -39,12 +39,11 @@
 		<script type="module" src="./main.js"></script>
 		<link rel="modulepreload" href="js/util.js">
 		<link rel="help" href="./instructions.html">
-		<title>Self-updating list of active Session communities</title>
+		<title>List of active Session Communities</title>
 		<meta name="description" content="
-			Directory of Session Open Groups — public chatrooms within Session Messenger.
-			Copy these Communities into the Session app
-			and talk anonymously about Privacy, Security, or Cryptocurrency.
-		">
+			Directory of Session Communities: public groups in Session Messenger. <?php
+			?>Join these Communities in the Session app <?php
+			?>to talk anonymously about Privacy, Security, or Cryptocurrency.">
 		<meta name="modified" content="<?=date("Y-m-d H:i:s", $timestamp)?>">
 		<meta property="og:title" content="Click here for Session Communities">
 		<meta
@@ -102,7 +101,7 @@
 					>Instructions</a>
 				</div>
 			</header>
-			<h1 id="headline">Session Communities</h1>
+			<h1 id="headline">List of Session Communities</h1>
 
 			<?php include "+components/issue-banner.php" ?>
 
@@ -129,20 +128,20 @@
 					</span>.
 				</p>
 				<p id="disclaimer">
-					Communities shown are fetched automatically from
+					Session Communities shown on this list are fetched automatically from
 					<a
 					href="<?=$REPOSITORY_CANONICAL_URL?>#which-sources-are-crawled"
 						target="_blank"
 					>various sources</a>.
 					<br>
 					<span class="js-only">
-						We make an attempt to hide communities containing
+						We make an attempt to hide Communities containing
 						objectionable or illegal content, but
 						you should still proceed with caution.
 					</span>
 					<span class="noscript">
 						Proceed with caution when joining unofficial communities.
-						As JavaScript is disabled, no communities are filtered from the list.
+						As JavaScript is disabled, no Communities are filtered from the list.
 					</span>
 				</p>
 				<p class="noscript">
diff --git a/sites/instructions.php b/sites/instructions.php
index 8294f19..7418f1e 100644
--- a/sites/instructions.php
+++ b/sites/instructions.php
@@ -3,6 +3,9 @@
 
 	$instruction_files = glob("+instructions/*.txt");
 	function file_language($file) { return pathinfo($file)['filename']; }
+
+	$languages = array_map('file_language', array_slice($instruction_files, 0, 10));
+	$language_enumeration = join(", ", $languages);
 ?>
 <!DOCTYPE html>
 <html>
@@ -21,16 +24,13 @@
 <?php endforeach; ?>
 		</style>
 		<meta name="description" content="
-			Discover how to use the sessioncommunities.online website
-			to help you join Session Open Groups; available in <?php
-			// Print languages instructions are available in.
-			$languages = array_map('file_language', array_slice($instruction_files, 0, 10));
-			echo(join(", ", $languages));
-			?>. In short: Use the Copy button or scan the QR code!
-		">
-		<meta property="og:title" content="How to join Session Communities">
-		<meta property="og:description" content="Learn how to use sessioncommunities.online to join">
-		<meta property="og:url" content="<?=$SITE_CANONICAL_URL?>/instructions.php">
+			Issues joining Session Communities?<?php
+			?>Read guides by sessioncommunities.online contributors, available in <?=
+			$language_enumeration
+		?>">
+		<meta property="og:title" content="How to — sessioncommunities.online">
+		<meta property="og:description" content="Learn how to use sessioncommunities.online to join Communities in Session Messenger.">
+		<meta property="og:url" content="<?=$SITE_CANONICAL_URL?>/instructions.html">
 		<meta property="og:type" content="article">
 		<title>Instructions — sessioncommunities.online</title>
 	</head>
diff --git a/sites/privacy.php b/sites/privacy.php
index d348fd0..31f660d 100644
--- a/sites/privacy.php
+++ b/sites/privacy.php
@@ -14,8 +14,13 @@
 
 		<link rel="canonical" href="<?=$SITE_CANONICAL_URL?>/privacy.html">
 		<title>Privacy — sessioncommunities.online</title>
-		<meta name="description" content="Read what data sessioncommunities.online collects">
-		<meta property="og:title" content="sessioncommunities.online — Privacy">
+		<meta name="description" content="<?php
+		?>This page covers the Privacy Policy of sessioncommunities.online <?php
+		?>and the data sessioncommunities.online collects when you browse the site. It's not a lot!">
+		<meta property="og:title" content="Privacy — sessioncommunities.online">
+		<meta property="og:description" content="Read our transparent account of what data sessioncommunities.online collects when you browse the site.">
+		<meta property="og:type" content="article">
+		<meta property="og:url" content="<?=$SITE_CANONICAL_URL?>/privacy.html">
 		<link rel="stylesheet" href="css/common-dark.css">
 		<style>
 			label, label a { text-decoration: underline dotted white 1px; text-underline-offset: 0.2em; }