Open Graph

The Open Graph protocol is a vocabulary of HTML metadata that describes a page as an object for consumers such as social networks and messaging apps. Its four core properties are `og:title`, `og:type`, `og:image`, and `og:url`; commonly used additions include `og:description`, `og:site_name`, locale data, and image dimensions and alternative text. These values provide preview inputs, but each platform decides what to fetch, cache, crop, override, or display.

Why it matters: Give each important shareable page an accurate title, canonical HTTPS URL, appropriate type, concise description, and representative public image. Include image width, height, MIME type, and `og:image:alt` where supported; make the asset crawlable without authentication and verify its response headers and redirects. Keep metadata consistent with the visible destination and avoid duplicate tags emitted by several plugins or templates. Test the live URL with the target platforms' inspection tools and on representative desktop and mobile surfaces. Preview crawlers cache results, so allow for refresh tools and recrawl delays after a change. Open Graph does not guarantee an identical card across platforms, a particular crop, distribution, engagement, or search ranking; platform-specific metadata and post-level edits may take precedence.