Web accessibility is often misunderstood as a niche concern—something relevant only to a small percentage of users, or a legal box to check before launching a site. In reality, accessibility improvements tend to benefit every visitor, often overlap directly with good SEO practices, and increasingly factor into how businesses are perceived online.
Whether you're building a new site or improving an existing one, understanding accessibility basics can lead to a better experience for all users—not just those with disabilities.
What Web Accessibility Actually Means
At its core, web accessibility means designing and building websites so that people with disabilities—visual, auditory, motor, or cognitive—can use them effectively. This includes people using screen readers, those who navigate using only a keyboard, people with color blindness, and many others.
Importantly, accessibility isn't just about people with permanent disabilities. Someone with a temporary injury, a person in bright sunlight struggling to read low-contrast text, or someone trying to use a website one-handed while holding a baby all benefit from accessible design choices.
The Overlap Between Accessibility and SEO
Many accessibility best practices align directly with what search engines look for. Descriptive alt text for images helps screen reader users understand visual content—and also helps search engines index images properly for image search.
Clear heading structure (using H1, H2, H3 tags in a logical order) helps users navigating with assistive technology understand the page's organization, while also helping search engines understand the hierarchy and relevance of your content. In both cases, the same underlying practice serves two purposes at once.
1. Color Contrast
Text that doesn't have enough contrast against its background can be difficult or impossible to read for users with low vision or color blindness—and frankly, difficult for anyone viewing a screen in bright light. Ensuring sufficient contrast between text and background colors is one of the simplest and most impactful accessibility improvements.
2. Keyboard Navigation
Some users navigate websites entirely using a keyboard, tabbing through links, buttons, and form fields rather than using a mouse. Every interactive element on your site should be reachable and usable via keyboard alone, with a visible indicator showing which element is currently focused.
A quick test: try navigating your own site using only the Tab key. If you get stuck, lose track of where you are, or can't reach certain buttons or links, keyboard users face the same problem.
3. Descriptive Link Text
Links labeled simply 'click here' or 'read more' provide no context when read out of order—which is how screen reader users often navigate, jumping between links on a page. Descriptive link text, like 'read our pricing guide' instead of just 'click here', makes navigation far clearer for everyone.
4. Form Labels and Error Messages
Every form field should have a clearly associated label, not just placeholder text that disappears once a user starts typing. When errors occur, messages should clearly explain what went wrong and how to fix it, rather than simply highlighting a field in red with no explanation.
5. Alt Text for Images
Alt text describes the content or function of an image for users who can't see it. For decorative images that don't convey meaningful information, alt text can be left empty so screen readers skip over them. For meaningful images—product photos, charts, diagrams—descriptive alt text ensures the information they convey isn't lost.
6. Video Captions and Transcripts
Videos without captions exclude users who are deaf or hard of hearing, and also anyone watching in a sound-off environment—which, in practice, is a large portion of mobile users. Captions and transcripts make video content accessible to a much wider audience, and transcripts can also be indexed by search engines as text content.
7. Avoiding Reliance on Color Alone
If important information is communicated only through color—for example, marking required form fields in red without any other indicator—users with color blindness may miss that information entirely. Pairing color with text labels, icons, or patterns ensures the meaning comes through regardless of how someone perceives color.
The Business Case for Accessibility
Beyond doing right by users, accessibility has direct business implications. A more accessible site reaches a broader audience, including the significant portion of the population living with some form of disability—a group with substantial collective purchasing power that's often overlooked.
There's also a growing legal dimension. Accessibility-related lawsuits against businesses with inaccessible websites have become increasingly common in several countries, making accessibility not just a usability consideration but a risk-management one as well.
"Accessible design isn't about designing for an edge case—it's about recognizing that 'normal' usage of the web is far more varied than most websites assume."
— Webier Team
Getting Started
You don't need to overhaul your entire website overnight. Start with an accessibility audit—there are free automated tools that can scan your site and flag common issues like missing alt text, poor contrast, or unlabeled form fields. These tools won't catch everything, but they provide a useful starting point.
From there, prioritize fixes that affect the most users and the most critical paths on your site—your homepage, navigation, and any forms related to contact or purchases. Accessibility is best treated as an ongoing practice woven into how you build and update your site, rather than a one-time project to check off and forget.