Short Answer
Web accessibility ensures websites are usable by people with disabilities. Learn about WCAG guidelines, ADA compliance requirements, screen readers, and why accessibility improves SEO. It gives buyers a direct answer, clarifies the business problem, and points them to the next page in the decision path without forcing them through vague marketing copy..
Web accessibility is the practice of designing and developing websites and web applications so that people with disabilities can use them effectively. This includes users with visual, auditory, motor, cognitive, and neurological disabilities.
The web was designed to be universally accessible — but poor implementation excludes an estimated 1.3 billion people worldwide who live with some form of disability.
Why Web Accessibility Matters
Ethical and Business Case
Approximately 26% of adults in the US have some type of disability. Inaccessible websites exclude these users from your content, your products, and your services. Beyond ethics, this is a business opportunity: the disability market represents $490 billion in disposable income in the US alone.
Legal Requirements
The legal risk of inaccessibility
In the United States, the Americans with Disabilities Act (ADA) has been interpreted by courts to apply to websites. ADA website accessibility lawsuits exceeded 4,600 in 2023 — targeting businesses of all sizes across retail, hospitality, healthcare, and finance.
Who is at risk: Any business with a public-facing website that sells products or services. This includes e-commerce, SaaS, local businesses, and professional services.
SEO Benefits
Accessibility and SEO are deeply aligned. Most accessibility best practices directly improve search engine performance:
| Accessibility Practice | SEO Benefit |
|---|---|
| Alt text on images | Image search ranking, crawler understanding |
| Semantic HTML headings | Content structure signals for crawlers |
| Descriptive link text | Anchor text relevance signals |
| Keyboard navigability | Improves Core Web Vitals (INP) |
| Captions on video | Text indexing of video content |
| Fast, simple layouts | Better Core Web Vitals scores |
WCAG: The Accessibility Standard
The Web Content Accessibility Guidelines (WCAG), published by the W3C, are the internationally recognized technical standard for web accessibility. The current version is WCAG 2.1. WCAG 2.2 added additional criteria in 2023.
Conformance Levels
| Level | Description |
|---|---|
| A | Minimum accessibility — must have |
| AA | Standard compliance — most legal references require this |
| AAA | Enhanced accessibility — aspirational for most sites |
WCAG 2.1 AA is the level required by most government mandates (EU Web Accessibility Directive, Section 508) and the level courts reference in ADA cases.
The Four WCAG Principles (POUR)
- Perceivable — Information must be presentable in ways users can perceive (alt text, captions, color contrast)
- Operable — Interface must be navigable by keyboard and assistive technology (focus management, no seizure-inducing content)
- Understandable — Content and UI must be understandable (readable language, predictable navigation, form error guidance)
- Robust — Content must be interpretable by current and future assistive technologies (semantic HTML, ARIA)
Common Accessibility Failures
These are the most frequently cited accessibility issues across the web:
- Low color contrast — text not sufficiently distinct from background
- Missing alt text — images without descriptive alternatives
- No keyboard navigation — users who cannot use a mouse are blocked
- Missing form labels — form fields without associated label elements
- Inaccessible PDFs — documents not tagged for screen readers
- Videos without captions — audio content inaccessible to deaf users
- Links with non-descriptive text — "click here" or "read more" without context
- Auto-playing audio/video — unexpected sound that interferes with screen readers
Accessibility Testing Tools
- WAVE (wave.webaim.org) — free browser extension, visual overlay of accessibility issues
- Axe DevTools — browser extension for developers, integrates with CI pipelines
- Lighthouse — built into Chrome DevTools, includes an accessibility audit
- NVDA / VoiceOver — test with actual screen readers on real pages
- Colour Contrast Analyser — verify foreground/background contrast ratios
How Moydus Helps
Moydus builds websites and web applications with accessibility built into the development process — semantic HTML, keyboard navigation, ARIA labels where needed, sufficient color contrast, and image alt text. We conduct accessibility audits on existing sites and remediate failures that create legal exposure or exclude users. Accessibility is not a checkbox — it is a quality standard.
Contact us for an accessibility audit or accessible rebuild.
Frequently Asked Questions
Related Terms
- What Is Mobile-First Design?
- What Is User Experience Design?
- What Is Technical SEO?
- What Is Page Speed?
The Problem
- Web accessibility ensures websites can be used by people with visual, auditory, motor, and cognitive disabilities.
- WCAG 2.1 AA is the internationally recognized accessibility standard — and the basis of most ADA lawsuits.
- ADA website accessibility lawsuits have exceeded 4,000 per year in the US — any public-facing business is at risk.
The Solution
Moydus uses What Is Web Accessibility? WCAG, ADA Compliance, and SEO Impact to explain the decision clearly, connect the topic to real use cases, and move readers toward the next practical step instead of generic education.
How It Works
- Define the exact question the page needs to answer.
- Translate the answer into plain language, examples, and decision criteria.
- Route readers to a comparison or service page when they move from learning to evaluation.
Expected Result
The reader gets a direct answer, understands the tradeoffs faster, and has a clear path to the next relevant page instead of bouncing after the first scan.
Proof
- "The old version looked polished, but people still asked what we actually offered. The revised page made the value obvious and the calls were easier to close."
- Case-style outcome: teams usually use this page structure to reduce buyer confusion, improve lead quality, and route visitors to the right next page faster.
FAQ
What is WCAG?
WCAG (Web Content Accessibility Guidelines) is the international standard for web accessibility, published by W3C. WCAG 2.1 Level AA is the most widely required.
Are websites legally required to be accessible?
In the US, the ADA has been interpreted to apply to websites, particularly for businesses open to the public. Courts have ruled against many.
What is a screen reader?
A screen reader is assistive technology that reads on-screen content aloud for users who are blind or have low vision. JAWS, NVDA, and VoiceOver.
Does web accessibility help SEO?
Yes. Alt text for images helps search engines and screen reader users. Semantic HTML structure helps crawlers. Descriptive link text and clear headings benefit.
Internal Links
- Hub page: Web Design Principles 2026: Essential Guidelines for Modern Websites
- Spoke page: Law Firm Website Redesign: +220% Organic Traffic and +45% Consultation Requests in 6 Months
- Spoke page: Web Design for Small Business: Complete Guide 2026
- Commercial page: Web Design for Healthcare – Patient-Centered Medical Websites