What are Rich Snippets?
You can mark up your structured HTML content any of three formats: microdata, microformats, or RDFa. You can use whichever standard you prefer.
A schema is basically a shared markup vocabulary (in HTML) which webmasters can use to markup their pages in ways recognized by major search providers.
On-page markup enables search engines to understand the information on web pages and provide richer search results in order to make it easier for users to find relevant information on the web. Markup can also enable new tools and applications that make use of the structure.









