Provide content that, when presented to the user, conveys essentially the same function or purpose as auditory or visual content.
Provide text equivalents of non-text content (images, pre-recorded audio, video).
The power of text equivalents lies in their capacity to be rendered in ways that are accessible to people from various disability groups using a variety of technologies.
Providing non-text equivalents (e.g., pictures, videos, and pre-recorded audio) of text is also beneficial to some users, especially nonreaders or people who have difficulty reading.