Open Graph tags are arguably the most important tags to implement on your site. These tags are used by Facebook, LinkedIn and Google+ for enhancing any shared content, which means that adding just a few tags to your site can help you to control your presence and branding on these social networks.
Open Graph Type tags are useful to indicate what type of content you are sharing. Social networks may display content differently based on the type of media. Additionally, each type of content may have additional fields that are available to use to describe your content.