How to use micro data in website? Will it use in all web pages or just have to add in targeted pages of the web site?
Your web pages have an underlying meaning that people understand when they read the web pages. But search engines have a limited understanding of what is being discussed on those pages. By adding additional tags to the HTML of your web pagesyou can help search engines and other applications better understand your content and display it in a useful, relevant way. Microdata is a set of tags, introduced with HTML5, that allows you to do this. - this is the best explanation and comes from schema, you should go and check it out it will be really helpful.