Out of the box with almost no configuration, I have good looking Facebook, Twitter, and Google+ social media buttons on pages and posts of my flying club web site at http://www.hawkflyingclub.org. The plugin appears not just to add social media buttons to pages and posts, but appears to add the Open Graph and Twitter meta information automatically to each page and post.
In the end, the only configuration after activation required was
- OpenGraph->Social Sharing->Facebook check "add button to content" and similarly for Google+ and Twitter.
- OpenGraph->Social Sharing check "Include on Index Webpages" so that the social media buttons would appear at the end of each post on the home page (and not just at the end of each individual post)
- OpenGraph->Social Style check "use the social styles" which the documentation says should be checked by default but wasn't for me.
I was initially confounded by the fact that the Facebook button did not appear on my staging copy of the web site on my localhost web server, but it appeared without incident on the web host's server. I never did figure out what was going on there.
In the course of goofing around with the plugin, I did have to hit the "clear all caches" button that appears on the various OpenGraph settings pages for my changes to appear, and clearing my browser cache also seemed necessary.