> What I don’t understand is if we omit e.g. the og:title meta tag, why can’t scrapers fall back to <title>? Or if there is no <meta name="og:description"> why

> What I don’t understand is if we omit e.g. the og:title meta tag, why can’t scrapers fall back to <title>? Or if there is no <meta name="og:description"> why not fall back to <meta name="description">? They do fall back to <title> and <meta name="description">. At least Facebook does. You can test it here (requires facebook login). It works though they complain about the missing tags. https://developers.facebook.com/tools/debug/ https://developers.facebook.com/tools/debug/