Twitter Cards
Also called: x cards, twitter card tags, twitter:card meta tag
Twitter Cards (now called X Cards) are HTML meta tags that control how a link previews when it is shared on X. Adding a twitter:card tag plus title, description, and image tags turns a bare URL into a rich card with a headline, summary, and thumbnail.
X reads four card types from the twitter:card value: summary (small square thumbnail beside the text), summary_large_image (a full-width image above the text), app, and player. For most content pages you want summary_large_image.
A minimal setup looks like this:
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:title" content="Page title">
<meta name="twitter:description" content="One-line summary">
<meta name="twitter:image" content="https://example.com/preview.jpg">
<meta name="twitter:site" content="@yourhandle">It piggybacks on Open Graph
X’s parser checks for the twitter: tag first, then falls back to the matching Open Graph (og:) property. If you already have og:title, og:description, and og:image, the only tag strictly required is twitter:card. Watch the attribute difference: Twitter tags use name, Open Graph uses property.
Practical specs: summary_large_image wants roughly 1200x628 px, and X quietly downgrades to the small card when the image drops below 300x157. X caches a card for 7 days after a link is first posted, so edits may not show until that cache clears. The old Card Validator lost its preview in 2022, so today you check a card by pasting the URL into the X post composer.
How it affects your traffic
Twitter Cards do not directly move Google rankings, but they shape click-through on the social and AI-referral traffic that increasingly feeds discovery. A bare link on X gets scrolled past, while a link with a clear headline and image earns clicks, reshares, and the referring signals that compound over time. Getting the card tags, Open Graph fallbacks, and image dimensions right is part of the technical hygiene our On-Page SEO work ships on every page, so your content looks presentable the moment someone shares it.
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