Question 1

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

Accepted Answer

substack.com's `og:image` is 400×400 pixels. Google Search recommends 1200×630 (1.91:1 aspect).

Question 2

What headline does substack.com use for social previews?

Accepted Answer

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

Question 3

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 4

What's the biggest issue with substack.com's Google Search preview?

Accepted Answer

Image won't fit social cards (400×400, 1:1). Your square-ish image will be cropped to 1.91:1 on Facebook, LinkedIn, and Slack, and to 2:1 on Twitter. Use 1200×630 (universal) or 1200×675 (Twitter-optimized) for predictable rendering.

Question 5

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` (1200×630), a clear `og:title` under 60 characters, and a 50-155 character `og:description`.

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