Google's Structured Data Guidence
If Google understands the content on your pages, we can create rich snippets—detailed information intended to help users with specific queries. For example, the snippet for a restaurant might show the average review and price range.
The Structured Data page in Webmaster Tools shows the structured information that Google was able to detect on your site.
See the structured data Google detected on your site
On the Webmaster Tools home page, click the site you want.
On the Dashboard, click Search Appearance.
Click Structured Data.
The Structured Data page lists each type of structured data discovered on your site, along with the number of URLs containing each type. To see source URLs, click an item. In the Source URLs list, click a link to see the structured data Google was able to extract from that page. To see how a piece of structured data might appear in Google’s search results, click Rich snippets preview.
Types of structured data that may appear on the Structured Data page include the following:
schema.org
Microformats
Microdata
RDFa
Data that you have tagged in Data Highlighter
If you used microformats, microdata, or RDFa to add structured data to a page, but the page is not listed here, use the structured data testing tool to make sure that Google can access and understand your marked-up content.
schema.org FAQ
About schema.org
What is schema.org? schema.org is a collaboration by Google, Microsoft, and Yahoo! to improve the web by creating a structured data markup schema supported by major search engines. On-page markup helps search engines understand the information on webpages and provide richer results. A shared markup vocabulary makes it easier for webmasters to decide on a markup schema and get maximum benefit for their efforts.
If you’ve marked up your content for rich snippets using microformats, microdata, or RDFa, then you're already familiar with the process. schema.org works the same way, using the microdata
The Structured Data page in Webmaster Tools shows the structured information that Google was able to detect on your site.
See the structured data Google detected on your site
On the Webmaster Tools home page, click the site you want.
On the Dashboard, click Search Appearance.
Click Structured Data.
The Structured Data page lists each type of structured data discovered on your site, along with the number of URLs containing each type. To see source URLs, click an item. In the Source URLs list, click a link to see the structured data Google was able to extract from that page. To see how a piece of structured data might appear in Google’s search results, click Rich snippets preview.
Types of structured data that may appear on the Structured Data page include the following:
schema.org
Microformats
Microdata
RDFa
Data that you have tagged in Data Highlighter
If you used microformats, microdata, or RDFa to add structured data to a page, but the page is not listed here, use the structured data testing tool to make sure that Google can access and understand your marked-up content.
schema.org FAQ
About schema.org
What is schema.org? schema.org is a collaboration by Google, Microsoft, and Yahoo! to improve the web by creating a structured data markup schema supported by major search engines. On-page markup helps search engines understand the information on webpages and provide richer results. A shared markup vocabulary makes it easier for webmasters to decide on a markup schema and get maximum benefit for their efforts.
If you’ve marked up your content for rich snippets using microformats, microdata, or RDFa, then you're already familiar with the process. schema.org works the same way, using the microdata