Schema Markup is a form of code that helps search engines understand the content of a webpage better. By adding this structured data to a website, owners can provide specific information about their content, such as articles, events, products, and reviews. This can enhance how their pages appear in search results, often leading to rich snippets that attract more clicks. Using Schema Markup can improve a website's visibility and ranking in search engine results. It is based on a vocabulary developed by Schema.org, which is a collaborative project among major search engines like Google, Bing, and Yahoo.