Site Previews - Unfurl, oEmbed, Twitter Cards, Facebook Open Graph, Meta Tags

Site previews are when links that are pasted in various places show previews or summaries of data related to the

This Slack blog post has a good description of all of this:

(and in a very meta way, this is a Medium link “unfurling” when pasted into Discourse)

Discourse calls this a Onebox, described here.


Twitter Cards

FB Open Graph

HTML Meta Tags

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