Question 1

Why does substack.com's Twitter card show a small image?

Accepted Answer

substack.com sets `twitter:card` to `summary`, which renders the image as a small thumbnail. To get the large hero image format, the meta tag would need to be `<meta name="twitter:card" content="summary_large_image">`.

Question 2

What Twitter card type does substack.com use?

Accepted Answer

substack.com uses the `summary` card type. This renders a small square thumbnail next to the title and description.

Question 3

What size is substack.com's social share image?

Accepted Answer

substack.com's `og:image` is 400×400 pixels. Twitter / X recommends 1200×675 (2:1 aspect).

Question 4

What headline does substack.com use for social previews?

Accepted Answer

substack.com's social headline is "Substack" (8 characters).

Question 5

What description does substack.com use for social previews?

Accepted Answer

substack.com's social description reads: "The app for independent voices" (30 characters).

Question 6

How can I improve substack.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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