The must meta tags for your website to appear on Google search, Google+, Facebook, Twitter, Pinterest: rich snippets.
Wnat your webiste to appear og google search with rich snippets like the one below, use structured data, SEO tags, Twitter cards and open graph protocol (enables any web page to become a rich object in a social graph).
Twitter Cards - will show rich text when someone will tweet your URL. You can specify website and app types of cards.
You can refer to Pinterest developer page for rich pins guide.