A SERP feature where Google displays a block of additional links beneath the main result for a query — typically the homepage of a brand, with 4 or 6 deep links to popular sub-pages (About, Pricing, Contact, etc.). Sitelinks are fully algorithmic; you can't directly request them. Influences include site structure, internal linking, anchor text consistency, and presence of clear navigation. The older "Sitelinks Search Box" feature was retired by Google in November 2024. Brand searches are the most common trigger, but informational queries can also surface sitelinks for resource-rich pages.