Optimizing and Integrating Schema On Your Website
WHAT IS SCHEMA?
Schema is structured data that makes it easier for search engines to understand what your content is about. You can use schema codes in HTML to classify information for products, locations, reviews, events, and more.
Here is another example of schema:
Read more about schema here
WHY IS SCHEMA GREAT FOR WEB DESIGNERS AND SEO SPECIALISTS?
Schema provides web designers with the ability to communicate more clearly what a page is about, and the more you're clear about the content you have, the more that will affect the value search engines place on your content. It doesn't replace good content, but it helps the search engines recognize great content.
But, it's not only for search engines, but also for the user. Someone is more likely to click on a link that is surrounded by reviews and other structured data than a link that has a basic meta description.