摘要（由llm生成）

Open Graph is a protocol introduced by Facebook in 2010, designed to enhance the display of preview cards when sharing links on social networks like Twitter. It allows websites to control how their content appears when shared, differentiating between links that show previews and those that do not. Twitter also has its own card system, which takes precedence over Open Graph if both are present. Tools like OpenGraph.xyz and opengraph.dev help in previewing and generating Open Graph meta tags for better social media sharing.

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Open-graph Intro

open graph 简述

Scenario

When we use Twitter, we notice that some links display preview cards while others do not.

This is because some websites have set up Open Graph, while others have not.

What is Open Graph?

Open Graph is a protocol introduced by Facebook in 2010, used for displaying preview cards when sharing links on social networks.

From its name and purpose, it’s evident that Open Graph signifies the openness of Facebook and other platforms supporting this protocol, especially amidst certain platforms that block external links or throttle those containing external links.

Similar to Open Graph, Twitter has its own card system. If both Twitter Card and Open Graph coexist, Twitter Card takes precedence. Only if Twitter Card is not defined, Open Graph is displayed.