diff --git a/website/src/content/docs/concepts.md b/website/src/content/docs/concepts.md
index d579124..995a417 100644
--- a/website/src/content/docs/concepts.md
+++ b/website/src/content/docs/concepts.md
@@ -1,6 +1,6 @@
 ---
 title: Concepts
-description: The mental model behind deterministic worlds, sealed runs, causal observation, and recursive agent societies.
+description: Understand deterministic worlds, real AI agent societies, sealed runs, causal observation, replay, and recursive organizations in Simfile.
 ---
 
 ## The world is deterministic; the society is not
diff --git a/website/src/content/docs/introduction.md b/website/src/content/docs/introduction.md
index 2fb3f60..a5e4edb 100644
--- a/website/src/content/docs/introduction.md
+++ b/website/src/content/docs/introduction.md
@@ -1,6 +1,6 @@
 ---
 title: Introduction
-description: Simfile is a deterministic world and observation layer for testing societies of agents.
+description: Learn how Simfile runs deterministic multi-agent simulations with real AI agents, modeled worlds, causal ledgers, and replayable experiments.
 ---
 
 Simfile is a research instrument for societies of agents. You declare a deterministic world around a Spawnfile organization, run the society inside it, seal the evidence, and then watch or scrub what happened.
diff --git a/website/src/content/docs/quickstart.md b/website/src/content/docs/quickstart.md
index b574ab0..97a6c92 100644
--- a/website/src/content/docs/quickstart.md
+++ b/website/src/content/docs/quickstart.md
@@ -1,6 +1,6 @@
 ---
 title: Quickstart
-description: Validate, run, observe, and replay a Simfile with the commands that ship today.
+description: Validate, run, observe, and replay a deterministic multi-agent simulation with the Simfile commands that ship today.
 ---
 
 For the current source release, use the checkout's own built CLI with Node.js
diff --git a/website/src/pages/index.astro b/website/src/pages/index.astro
index 773a779..54b18cd 100644
--- a/website/src/pages/index.astro
+++ b/website/src/pages/index.astro
@@ -10,10 +10,10 @@ import '../styles/landing.css';
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
-    <title>Simfile: a simulator for societies of AI agents</title>
+    <title>AI Agent Simulation for Multi-Agent Societies | Simfile</title>
     <meta
       name="description"
-      content="Build a deterministic world, drop in real AI agents, run your question forward through org behavior, product reception, and what spreads, then rewind the whole run."
+      content="Run deterministic multi-agent simulations with real AI agents. Model organizations and social dynamics, inspect causal timelines, and replay recorded runs."
     />
     <link rel="canonical" href="https://simfile.org/" />
     <link rel="sitemap" href="/sitemap-0.xml" />
@@ -21,15 +21,27 @@ import '../styles/landing.css';
     <meta name="author" content="Noopolis" />
     <meta property="og:type" content="website" />
     <meta property="og:site_name" content="Simfile" />
-    <meta property="og:title" content="Simfile: a simulator for societies of AI agents" />
+    <meta property="og:title" content="AI Agent Simulation for Multi-Agent Societies | Simfile" />
     <meta
       property="og:description"
-      content="Build a deterministic world, drop in real AI agents, run your question forward through org behavior, product reception, and what spreads, then rewind the whole run."
+      content="Run deterministic multi-agent simulations with real AI agents. Model organizations and social dynamics, inspect causal timelines, and replay recorded runs."
     />
     <meta property="og:url" content="https://simfile.org/" />
     <meta property="og:image" content="https://simfile.org/shots/viewer-memetics.png" />
     <meta property="og:image:alt" content="The Simfile viewer showing a seeded idea reaching a second AI agent." />
     <meta property="og:locale" content="en_US" />
+    <meta name="twitter:card" content="summary_large_image" />
+    <meta name="twitter:title" content="AI Agent Simulation for Multi-Agent Societies | Simfile" />
+    <meta name="twitter:description" content="Run deterministic multi-agent simulations with real AI agents, inspect causal timelines, and replay recorded runs." />
+    <meta name="twitter:image" content="https://simfile.org/shots/viewer-memetics.png" />
+    <script type="application/ld+json" set:html={JSON.stringify({
+      '@context': 'https://schema.org',
+      '@type': 'SoftwareApplication',
+      name: 'Simfile',
+      applicationCategory: 'DeveloperApplication',
+      url: 'https://simfile.org/',
+      description: 'A deterministic multi-agent simulation toolkit for running real AI agents inside modeled organizations and social worlds.',
+    })} />
     <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
     <GoogleAnalytics />
   </head>
