How does Schema work?

How does Schema work?

While most html tags tell search engines what your website says, schema markup tells search engines what your website means, which helps them deliver better quality search results to users. 

When you define item types and item properties on your site, you give search engines the structured information they need to create richer search results.

With out semantics,(meaning) search engines end up having to interpret your website data on their own and you’re left with a listing that may not be the best representation of your site.