Direct answer
Accessible structure helps people use content and makes meaning explicit, but accessibility should be implemented because people need it, not reduced to an SEO score.
Practical steps
- Use semantic landmarks and heading order.
- Provide names, labels, alternatives and status messages.
- Test keyboard, focus, zoom, reflow and contrast.
- Include disabled, RTL and multilingual users in QA.
Common mistakes
- Relying only on automated scans.
- Using ARIA to repair avoidable HTML problems.
- Claiming WCAG conformance from one test.
Limitations
- Automation detects only part of WCAG.
- Conformance applies to complete pages and processes.
Primary sources
- Web Content Accessibility Guidelines (WCAG) 2.2 — W3C; 2024-12-12; 2026-08-14.
- Search Engine Optimization — MDPI; 2021-02; 2026-08-14.