WHAT IS MICRO DATA, RICH SNIPPETS?
Micro data is a WHATWG HTML specification used to nest semantics within existing content on web pages. Search engines, web crawlers, and browsers can extract and process Micro data from a web page and use it to provide a richer browsing experience for users. Search engines benefit greatly from direct access to this structured data because it allows search engines to understand the information on web pages and provide more relevant results to users.
HOW TO ADD MICRO DATA TO YOUR SITE.
Adding data to your site is just like adding standard extra HTML to your site with either existing <div> tags or any other HTML tag you would like its just like adding a Class, e.g.
All tags needed can be found at schema.org
TOOLS TO HELP YOU ADD MICRO DATA AND TO TEST IT.
With Structured Data Markup Helper from Google helps you easily add tags to your existing site in the correct way easily add these tags in a simulator to then implement them to your site with the correct formatting.
With Googles Structured Data Testing Tool testing your webpages can not be easer this tool tells you exactly what google see’s and gives you pointers to where you are going wrong if you do