Schema markup, found at Schema.org, is a form of microdata. Once added to a webpage, schema markup creates an enhanced description (commonly known as a rich snippet), which appears in search results.
Below are some of the most popular uses of schema.
Businesses and organizations, Events, People, Products, Recipes, Reviews, Videos
Adding Schema to Your Webpages
Microdata is a set of tags that aims to make annotating HTML elements with machine-readable tags much easier. Microdata is a great place for beginners to start because it’s so easy to use.
However, the one downside to using microdata is that you have to mark every individual item within the body of your webpage. As you can imagine, this can quickly get messy.
If you’re still feeling a little intimidated by the code, Google’s Structured Data Markup Helper makes it super easy to tag your web pages.
RDFa is an acronym for Resource Description Framework in Attributes. Essentially, RDFa is an extension to HTML5 and it was designed to aid users in marking up structured data.
To aid you, every page on Schema.org provides examples of how to properly apply tags. Of course, you can also fall back on Google’s Structured Data Testing Tool.
JSON-LD structured data is a script that can be placed anywhere on a web page that communicates Schema.org structured data.
It can be placed in the head section with all the other metadata like the title tag and meta description. It can also be placed near the end of the code, near the closing body tag.
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