What is Schema markup?
Schema markup is a semantic vocabulary for HTML that provides extra information for search engines. Schema tell search engines what your data means, which changes the way search results are displayed with rich snippets and meta information extracted from your pages.
Organisation/Localbusiness Schema markup tells the search engines information about your business, its location, branches, stores, etc.
What does Schema-GMapify do?
This plygin extracts information from Schema markup in your page and generates a Google Map widget with multiple markers, titles, descriptions.