Schema.org provides a collection of shared vocabularies webmasters can use to mark up their pages in ways that can be understood by the major search engines: Google, Microsoft, Yandex and Yahoo!

If you've ever used rich snippets, you'll understand exactly what schema markup is all about. Here's an example of a local business that has markup on its event schedule page.

Schema markup is code (semantic vocabulary) that you put on your site to enable the web crawlers to return more enlightening outcomes for clients. In the event that you've at any point utilized rich bits, you'll see precisely what pattern markup is about. Here's a case of a neighborhood business that has markup on its occasion plan page.

The database schema is its structure described in a formal language supported by the database management system.

What is schema?
 

A schema is a cognitive framework or concept that helps organize and interpret information. Schemas can be useful because they allow us to take shortcuts in interpreting the vast amount of information that is available in our environment.

Schema is a type of microdata that helps search engines better analyze and interpret information on your web pages so that they can show users relevant results based on search queries.