VoiceOver is the built-in screen reading technology built into Apple’s operating systems, including macOS and iOS. VoiceOver allows users to have all of the written content in the operating system, app, or web browser read back to them.
This includes allowing users to navigate web pages and software through keyboard commands. VoiceOver also reads out alternative image descriptions, and indicates links and site headings, so that users know where they are in the page structure.