Schema markup refers to some codes you can add to your website for crawlers to take more explanatory information to the user. Rich snippets are data structured in a particular way that search engines can easily find and recognize what content each web page on your website contains. Schema markup and rich snippets are closely linked together. As schema markup can help with rich snippets, it can also boost Your CTR.
Schema is a means for ranking higher. However, simply adding it will not help with your ranking. As we’ve reiterated in this guide many times, additional content is always a good idea. There are also several ways you can earn rich snippets using schema markup. You can add breadcrumbs, FAQs, events, visual data, et cetera.