New answers tagged thumbnail
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Source: http://ogp.me/
og:image:url - Identical to og:image.
og:image:secure_url - An alternate url to use if the webpage requires HTTPS.
og:image:type - A MIME type for this image.
og:image:width - The number of pixels wide.
og:image:height - The number of pixels high.
Example:
<meta property="og:image" content="http://example.com/ogp.jpg" />
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