Who is excluded and why it matters

Accessibility means building so that people with disabilities can use what you made. It is treated as a specialist concern and it affects a larger group than most developers assume.

Who is affected. People who are blind or have low vision, who use screen readers or large text. People who are colour blind, which is roughly one man in twelve. People who cannot use a mouse and navigate by keyboard. People who are deaf, needing captions. People with motor difficulties needing larger targets. And people with cognitive differences needing clear language and predictable layouts.

Then the larger group nobody counts. Older users, whose vision and dexterity have changed. Anybody with a temporary injury. Somebody on a phone in bright sunlight, which is a vision problem. Somebody in a noisy place who cannot use audio. Accessible design helps all of them.

In Pakistan the population affected is in the millions and the web here is largely built without considering them at all, which means an accessible site is also a competitive one.

The commercial argument. More users, better search visibility because much of it overlaps with semantic markup, and a requirement in international contracts, where accessibility standards are increasingly mandatory and a supplier who cannot meet them is excluded.

And the honest argument. Somebody who cannot use your site because of how it was built has been excluded by a decision, and that decision was usually made without anybody realising they were making it.