When I first installed this plugin, I didn't know too much about OpenGraph or SEO. This one really helped me to understand everything I could do to get traffic to my site. You need every bit of info in your meta tags to get Facebook, Google+, Twitter, LinkedIn to know exactly what is being shared and link it more effectively.
You need as much info you can get with your shared content so that people are more willing to click the link and get to your site and this is what this plugin is all about. You only need to configure it with some basic info about your site and it will automatically generate the other tags based on your pages and media content.
JS does a great job at maintaining this plugin, he's always releasing updates to make sure that everything keeps working. I've looked at other plugins since my first install and I always end up keeping NGFB, the tags generated here really follow standards specified by Facebook,Google and others.