Schema Markup
Schema markup is a structured vocabulary added to a page's code to help search engines understand its content precisely.
Through Schema.org, a page can specify that it's an article, a recipe, an event, or a product listing, with fields like price, date, or average rating.
This markup unlocks rich snippets: stars, prices, FAQs shown directly in search results. In a competitive market, it's the difference between a plain result and one that catches the eye.