Question 1

What is fastify.dev's Open Graph type?

Accepted Answer

fastify.dev declares `og:type` as `website`. This tells Slack how to categorize the content when generating a preview.

Question 2

What size is fastify.dev's social share image?

Accepted Answer

fastify.dev's `og:image` is 1200×630 pixels. Slack recommends 800×418 (1.91:1 aspect).

Question 3

What headline does fastify.dev use for social previews?

Accepted Answer

fastify.dev's social headline is "Fast and low overhead web framework, for Node.js | Fastify" (58 characters).

Question 4

What description does fastify.dev use for social previews?

Accepted Answer

fastify.dev's social description reads: "Fast and low overhead web framework, for Node.js" (48 characters).

Question 5

What site name does fastify.dev display on social cards?

Accepted Answer

fastify.dev sets `og:site_name` to "Fastify". This appears as a small attribution label on Facebook, LinkedIn, and Slack.

Question 6

What's the biggest issue with fastify.dev's Slack preview?

Accepted Answer

Canonical URL and og:url do not match. canonical: https://fastify.io/

Question 7

How can I improve fastify.dev'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` (800×418), a clear `og:title` under 60 characters, and a 50-155 character `og:description`.

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