Page anchors (URL fragment)
Page anchors are HTML identifiers placed on page elements (id="section-name") and targeted by links using the hash symbol (#section-name). They allow pointing directly to a specific passage within a long page, improving navigation and internal linking precision.
In practice
Google indexes anchors and can surface them in results as jump links. For internal linking, pointing directly to a relevant section of another article (#definition, #example, #comparison-table) improves user experience and sharpens the thematic signal sent. Naming anchors descriptively (id="definition-dwell-time") rather than generically (id="section-1") is a recommended practice.