Website accessibility is the practice of building sites that everyone can use, including people with disabilities. It sounds like a compliance requirement, and it partly is. But accessibility is also an SEO advantage, a quality signal, and good business. This post covers what it actually means and why it deserves a place in every website project.
What accessibility actually means
Accessibility is usually measured against WCAG, the Web Content Accessibility Guidelines. WCAG is organized around four principles, and it's worth knowing them because they map directly to design decisions:
- Perceivable. Content can be seen or heard, meaning alt text for images, text that contrasts with its background, and captions for video.
- Operable. Everything can be used, meaning the site works by keyboard, navigation is predictable, and nothing traps the user.
- Understandable. The interface is clear, meaning readable text, consistent navigation, and forms that explain what they need.
- Robust. The site works with assistive technology like screen readers, which means clean, valid markup.
None of this requires special design. It requires attention to the same things that make a site good for everyone: clear hierarchy, readable type, sensible contrast, and code that holds together.
Why it matters for your business
Accessibility is not a niche concern. About one in six people has a disability, and that's a lot of potential customers. A site they can't use is a site that excludes them. It also matters practically: accessibility lawsuits over website compliance have grown sharply, and businesses have been sued for sites that fail basic WCAG standards. Fixing accessibility at build time is far cheaper than defending a claim later.
Why it matters for SEO
Accessibility and SEO are not the same thing, but they overlap heavily. The things Google rewards, clear headings, descriptive link text, alt attributes, readable content, and semantic HTML are largely the same things assistive technology relies on. Alt text helps a screen reader describe an image, and it also helps search engines understand the image. Semantic headings help a screen reader navigate, and they also tell Google what the page is about. A more accessible site is usually a more crawlable site.
Practical basics every site should have
These are the fundamentals that get a site most of the way there:
- Alt text on meaningful images and empty alt text on decorative ones.
- Color contrast that meets WCAG, so text is readable for people with low vision and on bright screens.
- Full keyboard navigation with a visible focus indicator.
- Logical heading structure with one h1 per page.
- Descriptive link text instead of "click here."
- Labels on every form field and clear error messages.
Accessibility is a build-time decision
Retrofitting accessibility is harder than building it in. A custom build can get the semantic structure, contrast, and keyboard behavior right from the start. Templates and page builders make some of it an uphill fight. That's one of the quieter advantages of custom web design: the foundation is built to be accessible, not patched later.
My performance and accessibility work covers auditing where a site falls short and fixing it, whether the site is new or years old.
The honest summary
Website accessibility is not an add-on or a legal box to tick. It's the practice of making your site work for the widest possible audience, and it pays back in more customers, better SEO, and less risk. If your site hasn't been reviewed for accessibility, that's worth checking. Get in touch and I can help you see where it stands.