Schema markup (also called schema or structured data) is one of the skillsets you need when implementing technical SEO onto your site.
It allows search engines like Google to better crawl and, more importantly, understand the information on your site to provide better results for users.
Schema markup is also one of the best ways you can use to stand out from your competitors in search results. It's a good thing to take advantage of since only 30% of pages online use Schema.org to markup their pages. That's why you want to use structured data for SEO.
So, what is schema markup in SEO, and how can you implement schema markup for Google?