In user experience, there is a concept of creating experiences that are usable, useable, and responsible. This section primarily applies to Usability, defined as:

Perceivable, operable, understandable, regardless of disability, literacy, or device access.

Perceivable

When creating content, ask yourself if it will be understandable to someone using a screen reader, text-to-speech, or another accessibility tool:

• Are you using phrases like “see the diagram below”? Will someone without a sense of spatial position understand that? Is content laid out in a chronological order so a screen reader can give the information to the user properly?
• Are you using terms like “see more” when someone using it might not have sight?
• Are you using terms like “tap here” when you don’t know what device type they are using, or may not have the physical ability to tap and instead are using text-to-speech?
• Are you referring to a color of a button when someone may not be able to see color, or at all?
• Are you embedding text in an image that a screenreader would not pick up?
• Do your audio and video content have captions?

Sometimes this comes down to page design, and creating proper content tagging, like h1, h2, etc. but this also means writing in a way that tries to be aware of users in with any ability, in any context.

Operable

• When creating fields and forms, does your labeling persist when focusing on the field? Would this still work with a screenreader, or someone using text-to-speech?
• Do labels and captions pre-empt what they describe so someone using a screenreader knows what a field is before they select it? Would the screenreader read the label only after the field is selected?
• Do pages feel overly dense? Will this load well on any device, or with any internet speed?

Understandable

Content should be understandable, regardless of literacy level, cognitive impairment, or learning disability.