Jetpack automatically disables its Open Graph tags when there’s a known plugin that already adds Open Graph tags, which is good. Sometimes, though, you might want to use Jetpack’s version instead. Even if you disable the tags in the conflicting plugin, Jetpack won’t add Open Graph tags without being told to do so.
This is great for when you want to use the awesome WP SEO by Yoast plugin or others like All-in-One SEO, but, for whatever reason, would like to use Jetpack’s OG tags instead.
There’s a second reason to reach for this one: Jetpack only outputs its Open Graph tags when Jetpack Social (formerly Sharing) is active, since that’s the feature the tags were originally built for. If you aren’t publicizing posts anywhere and have left Jetpack Social turned off, Jetpack skips the tags entirely. This plugin turns them back on, so you get Jetpack’s Open Graph and Twitter Card markup without enabling any of the sharing features.