Schema Markup is the assistive links right below a certain search where you get to jump to a particular page on the website. For your customers or visitors, these serve as their shortcut to Log-in, purchase, or view specific pages within your site so that they would have better navigation of the website because you practically show them where is which. Regarding SEO, Schema Markup tells search engines what your content means and not just what it says. If search engines better understand what your website is about, the better your search ranking gets.