Schema.org Markup, also known as Structured Data, is a language that webmasters can use to organize metadata on their websites and help search engines understand what they’re publishing. It includes more than 250 schemas from creative work schemas (such as book, author, etc.) to person schemas (such as birthday, address, etc.)
The major advantage of using schema.org markup is its ability to provide context for search engine crawlers and users browsing your site in a browser tab or mobile device app without having to open it up in another window or download an application from the respective company’s store.
Metadata written using schema.org can be extracted and processed from web pages by search engines, web crawlers, and smart agents to provide a richer browsing experience for users.