Open Graph Tags
Meta tags controlling the preview card when your URL is shared. Absolute image URL, 1200×630, raster.
Open Graph tags are the og: meta tags describing a page for social platforms: og:title, og:description, og:image and og:url. They control the card that appears when the link is posted. An og:image around 1200 by 630 pixels is the safe size, and it must be an absolute URL for most platforms to fetch it.
Definition
Open Graph tags are <meta property="og:..."> elements that control how a URL appears when it is shared — the title, description and image in the preview card on social platforms, messaging apps and chat tools.
The core set is og:title, og:description, og:image, og:url and og:type. X reads twitter:card in preference to Open Graph, so most sites ship both.
The image is the part that goes wrong. It needs an absolute URL, roughly 1200×630 pixels, and a raster format — several platforms reject SVG outright and show a blank card instead.
Across every site SlapMyWeb has audited, 61.6% ship Open Graph tags — which leaves 38.4% with no preview when the link is shared.
Measured from SlapMyWeb audits of live public URLs. The full aggregate is published as a CC-BY-4.0 dataset.
Why It Matters
Open Graph tags are not a ranking factor, but they decide whether a shared link looks like a considered page or a broken one — and that difference shows up in click-through, which is what a share is for.
Without og:image, platforms guess: they pick whatever image they find first, which is often a logo, an avatar or nothing at all.
Example
The minimum worth shipping:
<meta property="og:title" content="Free SEO Audit Tool">
<meta property="og:description" content="240+ checks in 30 seconds.">
<meta property="og:image" content="https://example.com/og.png">
<meta property="og:url" content="https://example.com/">
<meta name="twitter:card" content="summary_large_image">Then paste the URL into a preview checker before you rely on it — a relative og:image path is the most common silent failure.
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