“Structured data markup” is a standard way to annotate web content so machines can understand it. When your pages include markup for structured data, search engines (specially Google) can use that data to index your content better, present it more prominently in search results, and surface it in new experiences like voice answers, maps, and Google Now.
To make your pages eligible for Rich Snippets in search results, add the appropriate type of structured data to your content and test it with a good Structured Data Testing Tool. Google supports Rich Snippets for the following structure data types:
- Product — Information about a product, including price, availability, and review ratings.
- Recipe — Recipes that can be displayed in web searches and Recipe View.
- Review — A review of an item such as a restaurant, movie, or store.
- Event — An organized event, such as musical concerts or art festivals, that people may attend at a particular time and place.
- SoftwareApplication — Information about a software app, including its URL, review ratings, and price.
Structured Data Testing Tool
There are many places to look for a good Structured Data Testing Toos. This page has a list ready for you. Enter a URL for the tool to fetch, or paste in marked-up HTML code directly. Don’t forget to repair all errors reported by the tool before deploying your markup! Enjoy better visibility.
If you need an Offline Structure Data testing tool to validate your localhost pages… try the microdata-tool jQuery plugin. It displays the metadata it is able to extract directly in your markup, pretty good for using it offline or on localhost. Although it’s work in progress (it has a GitHub project where you can contribute), it supports already many schema.org’s metadata.