Alt text is read by screen readers in place of an image, conveying the image’s content and functionality to those with visual or certain cognitive disabilities. Every image should have an alt attribute.
Transcripts are essential to people who are unable to hear or have difficulty hearing audio and who are unable to see or have difficulty seeing video. Captions provide text versions of audio, but they are synchronized with the media. Audio descriptions make video accessible for people who are blind or visually impaired by providing short, audible descriptions of what is visible on the screen.
Headings add structure and meaning to webpages and documents by labeling each content part and indicating the order and relative importance of those parts
The accessibility and usability challenges presented by carousels, slideshows, and sliders are well-documented: animations can be distracting, transitions between images too fast, and keyboard navigation lacking.
Web accessibility means creating digital resources on the web that everyone can use.