Osclass plugin SEO PRO new version 3.7.0 with new Functions for Social networks and Google Search.
A post to Google+ that includes a link renders a preview, or snippet, that contains the item title, a brief description of the item, and a thumbnail image. These pieces of data are extracted from the shared item URL ... Google also uses Schema microdata to generate rich snippets in search...
Facebook Open Graph
Most content is shared to Facebook as a URL, so it's important that you mark up your items with Open Graph. This will improve the sharing of items in Facebook
This Markup will improve the sharing of items in Twitter
You can download a new version of the plugin from your personal account.