A database schema for a database system is its structure described in a formal language supported by the database management system and refers to the organization of data as a diagram of how a database is built.

Once added to a web , a form of microdata creates an enhanced description (commonly known as a rich snippet), which appears in search .

Schema.org

Code that “wraps” the elements of your web page to provide information about it to the search engine. Data that uses schema.org is called “structured” rather than “unstructured” – in other words, organized rather than disorganized.

Local business scheme

markup placed on a web page helps search engines understand information about a company .