is a collaborative, community-driven project that aims to create a common set of structured data markup schemas that can be used by webmasters and developers to provide additional context and metadata to search engines. Structured data markup, also known as schema markup, helps search engines understand the content and context of webpages more effectively, leading to richer and more informative search results for users. provides a wide range of schemas for different types of content, including articles, events, products, reviews, and organizations, allowing webmasters to mark up key information such as titles, descriptions, dates, prices, and ratings in a standardized format that can be understood by search engines.

Implementing schema markup on a website involves adding structured data markup to HTML code using vocabulary and syntax. This markup helps search engines understand the meaning and context of content on webpages, leading to enhanced search result features such as rich snippets, knowledge panels, and carousel listings. By implementing schema markup, businesses can improve their visibility in search results, enhance the user experience, and increase click-through rates and engagement. Additionally, schema markup can help businesses appear in voice search results and other emerging search technologies by providing additional context and metadata to search engines.

Also see: User intent, Featured snippets, Voice search optimization, Image optimization, Video optimization, Structured data, Knowledge graph, Featured snippets, Local packs, Mobile-first indexing, Accelerated Mobile Pages (AMP), E-A-T (Expertise, Authoritativeness, Trustworthiness), Core Web Vitals, Off-page SEO