schema
Open Graph protocol
The meta tag standard for declaring how URLs render when shared — og:title, og:description, og:image.
Definition
Open Graph is a protocol (originally from Facebook, 2010) of meta tags that declare structured information about a URL for use in social share cards. Core tags: og:title, og:description, og:image (1200×630 recommended), og:type, og:url. Now used by Facebook, LinkedIn, Discord, Slack, WhatsApp, iMessage, and most AI engines for link-preview generation. The single highest-leverage shareability investment.
Example
<meta property='og:image' content='https://example.com/social.png' /> renders that image as the preview card on every platform.How to optimize
Set all 5 core OG tags on every page. Use 1200×630 og:image. Build programmatic OG images for high-value pages. Validate with Facebook's Sharing Debugger.