Schema markup (or structured data) is a standardized markup (Schema.org) added to a page's HTML code to help search engines and AIs understand the content, entities and relationships on the page.
Schema markup plays a dual role in GEO. First, it helps AI crawlers understand your content. Second, it reinforces E-E-A-T signals by clearly identifying authors, organization and information structure.
For a complete implementation guide, see our article Schema markup for GEO. At PingPrime, schema markup is an integral part of the Do phase of our IDO methodology.