diff --git a/Inundator/index.html b/Inundator/index.html
index 48c9033..235dbcb 100644
--- a/Inundator/index.html
+++ b/Inundator/index.html
@@ -5,6 +5,16 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Inundator - Interactive Reservoir Inundation Visualization</title>
 
+    <!-- SEO meta description -->
+    <meta name="description" content="Interactive dam simulation: place a dam on any river and watch the reservoir fill. Visualize inundation extent using real elevation data.">
+
+    <!-- Open Graph -->
+    <meta property="og:title" content="Inundator - Interactive Reservoir Inundation Simulator">
+    <meta property="og:description" content="Interactive dam simulation: place a dam on any river and watch the reservoir fill. Visualize inundation extent using real elevation data.">
+    <meta property="og:type" content="website">
+    <meta property="og:url" content="https://liotier.github.io/Geogizmos/Inundator/">
+    <meta property="og:image" content="https://raw.githubusercontent.com/liotier/Geogizmos/refs/heads/main/Inundator/Screenshot_2025-11-20_Inundator_Interactive_Reservoir_Inundation_Simulator.png">
+
     <!-- MapLibre GL -->
     <link href="https://cdn.jsdelivr.net/npm/maplibre-gl@5/dist/maplibre-gl.css" rel="stylesheet" />