Screen Reader

A screen reader is assistive technology that reads the content of a page aloud, or sends it to a braille display, for people who are blind or have low vision. It works through the page's underlying markup, announcing text, links, headings, and the alternative text behind images.

This is why structure matters so much. A screen reader navigates by the bones of your page, so headings and alternative text turn a wall of sound into something a person can move through. Building for a screen reader is core to web accessibility.