Websites can customize their Discord link preview with a component embed, and new Link Previews documentation covers the tags Discord reads from a page.
Websites can now customize how their links look when shared on Discord. Add a discord:component-embed JSON payload to your page and Discord renders the link preview using a Components V2 layout instead of the default preview. Component embeds are display-only, so nothing sends an interaction, and you don't need an app or a bot to use them.
Messages carrying one of these previews have a new components embed type, with a components array holding the single Container that makes up the embed.
We've also published Link Previews documentation covering which Open Graph, Twitter Card, and oEmbed tags Discord reads from a page when it builds a preview.