You want to get followed & shared. The premium plugin increases the chances that this happens:
- Define which pictures & snippet text should get shared for every page or post
- Add pictures and snippets also to tweets (‘Twitter cards’)
- Use an URL-shortener for cleaner links
- Allow people to follow you on Google+ directly on your site (i.e. without leaving the page)
- Define the specific page which gets liked (which might be different than where the button appears, e.g. your Facebook page)
All this leads to more sharing, more attractive sharing content and more traffic!