There are multiple ways for JFBConnect to include the OpenGraph tags, as described here
here
.
* If you'd like the Open Graph image and descriptions pulled from the articles, the simplest way would be to enable the 'Open Graph - Content' plugin for JFBConnect. JFBConnect will then automatically generate some tags
* If you need further control, for instance which image is selected for an article, then either 1) create an Open Graph object as described in the above link or 2) use our SCOpenGraph easy-tags.
The missing twitter:site tag can be generated if you enable Twitter card. Go into the JFBConnect backend > Meta > Configuration area to do this.
Let us know if you have further questions.
-Melissa