Question 1

What Twitter card type does github.com use?

Accepted Answer

github.com uses the `summary_large_image` card type. This renders a large hero image above the title and description - the most engaging format.

Question 2

What Twitter handle does github.com associate with shared cards?

Accepted Answer

github.com sets `twitter:site` to `@github`. This handle is shown as attribution next to the card on Twitter.

Question 3

Does github.com declare image dimensions?

Accepted Answer

github.com sets `og:image` but does not include `og:image:width` and `og:image:height`. Explicit dimensions let platforms render the preview faster without downloading the image first.

Question 4

What headline does github.com use for social previews?

Accepted Answer

github.com's social headline is "GitHub · Change is constant. GitHub keeps you ahead." (52 characters).

Question 5

What description does github.com use for social previews?

Accepted Answer

github.com's social description reads: "Join the world's most widely adopted, AI-powered developer platform where millions of developers, businesses, and the largest open source community bu…" (186 characters).

Question 6

What site name does github.com display on social cards?

Accepted Answer

github.com sets `og:site_name` to "GitHub". This appears as a small attribution label on Facebook, LinkedIn, and Slack.

Question 7

What's the biggest issue with github.com's Twitter / X preview?

Accepted Answer

Description is 186 characters - truncated on most platforms. LinkedIn cuts at ~100, Facebook at ~130, Google at ~160 characters.

Question 8

How can I improve github.com's social previews?

Accepted Answer

Review the recommendations above - they list specific issues and provide ready-to-paste meta tag snippets. The highest-impact fixes are usually a properly sized `og:image` (1200×675), a clear `og:title` under 60 characters, and a 50-155 character `og:description`.

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