Navigability

The ease and efficiency with which a user can move through a web page, application, or document to reach their intended content. For accessibility practice, navigability is a primary determinant of whether a screen-reader, voice-browser, or keyboard-only user can actually complete a task — distinct from raw compliance with accessibility guidelines. It is influenced by heading structure, ARIA landmarks, skip links, predictable ordering, and the presence of distinctive text cues (information scents) that let users orient themselves. Navigability can be measured empirically through metrics such as 'reaching time' — the shortest listening time required to arrive at the main content — and through behaviour-logging tools that trace a user's path across fragments of a page.