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Web accessibility means that websites, tools, and technologies are designed and developed so that people with disabilities can use them. More specifically, people can perceive, understand, navigate, and interact with the Web, and they can contribute to the Web.

Accessibility is essential for several reasons:

• It ensures equal access to information for all users.
• It is a legal requirement in many jurisdictions.
• It improves usability for everyone, not just people with disabilities.
• It enhances SEO and broadens your audience reach.

The Web Content Accessibility Guidelines (WCAG) are a set of recommendations for making web content more accessible. They are organized around four principles, often referred to as POUR: Perceivable, Operable, Understandable, and Robust. The current version, WCAG 2.2, includes criteria at three conformance levels: A, AA, and AAA.

There are several approaches to testing for accessibility:

• Use automated tools like axe, Lighthouse, or WAVE.
• Perform manual keyboard navigation testing.
• Test with screen readers such as NVDA, JAWS, or VoiceOver.
• Conduct usability testing with people who have disabilities.
• Review your code against WCAG 2.2 success criteria.