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SEO and accessibility are usually treated as separate workstreams. SEO gets its own audit, its own tools, its own checklist. Accessibility, when it gets attention at all, is handled separately (often later). The problem is that search engines and assistive technologies are solving the same underlying problem: making sense of a page without relying on visual interpretation.
Google's crawler does not see your page. It reads it, much like a screen reader does. That means the same structural decisions that make a page difficult for a visually impaired user to navigate also make it harder for a crawler to understand, index and rank. The overlap is not coincidental. Here are the accessibility issues most likely to be costing you organic traffic right now.
Missing or poor alt text
Images without alternative text are invisible to search engines. A product photo, an infographic, a chart – without a descriptive alt attribute, none of that content contributes to how the page is understood or indexed. You lose visibility in image search and the page itself gets less contextual signal around the topics it is supposed to cover.
Equally damaging is alt text that is technically present but unhelpful: file names, generic labels like 'image1', or descriptions so vague they add nothing. Alt text should describe what the image shows and, where relevant, why it is there. That is good practice for screen reader users and a direct input into how search engines assess page relevance.
Broken heading structure
Headings are how both crawlers and screen reader users build a mental model of a page. A logical H1 followed by a consistent hierarchy of H2s and H3s tells a search engine what the page is about, which topics are primary and how the content is organised. When that structure is missing – when headings are chosen for their visual appearance rather than their semantic meaning, or skipped entirely – the crawler loses the map.
Pages with poor heading structure tend to rank weaker on secondary and tertiary topics, because those topics are never clearly signalled. The content may be there, but the structure needed to make it readable is missing.
Non-descriptive link text
Link text is one of the clearest signals a page sends about its content and its relationships to other pages. ‘Click here’, ‘read more’, ‘learn more’; these tell a search engine nothing about where the link leads or why it matters. They waste the relevance signal that anchor text carries, weaken internal linking, and make it harder for crawlers to understand the topical connections between pages on your site.
For screen reader users, the problem is more direct: links are often navigated out of context, as a list. A page full of ‘click here’ links is genuinely unusable. Fixing this – so, replacing vague link text with descriptive, keyword-relevant phrases – improves both accessibility and crawlability in a single edit.
JavaScript-heavy content with no semantic fallback
Content rendered entirely through JavaScript presents a real indexing risk. Googlebot can execute JavaScript, but it does so asynchronously and incompletely. Content that requires JavaScript to render – text, navigation, product listings, reviews – may not be seen at all during the initial crawl, or may be indexed with significant delay.
The accessible approach is also the safer SEO approach: core content and navigation should be present in the HTML, not dependent on a script to exist. Server-side rendering or static generation for key pages isn’t just a performance choice; it’s a guarantee that what you have built can actually be read.
Duplicate or missing page titles
Page titles are the single most direct signal a page sends to search engines about its purpose. Duplicate titles cause pages to compete with each other for the same queries, diluting ranking potential across the site. Missing or auto-generated titles (which are common in CMS configurations that default to template strings) leave the decision about what a page is about entirely to the crawler's interpretation.
From an accessibility standpoint, the page title is the first thing a screen reader announces when a page loads. A clear, descriptive, unique title is a basic orientation tool. It is also one of the highest-impact on-page SEO elements, as well as one of the most frequently neglected.
Missing landmarks and semantic regions
HTML5 landmark elements – main, nav, header, footer, aside – do two things simultaneously. They give screen reader users the ability to jump directly to the section of a page they need, and they give crawlers a structured understanding of what each region of a page contains and how it relates to the whole.
A page built entirely from generic div elements with no semantic structure looks flat to a crawler. There is no clear distinction between navigation, primary content and supplementary material. That lack of structure makes it harder to weight content appropriately and harder to understand the page's purpose. Adding landmarks costs nothing in development time and improves both accessibility and content comprehension for crawlers.
Poor usability drives the signals that rankings depend on
Google's ranking algorithms factor in engagement signals: how long users stay on a page, whether they return to the search results immediately, how they navigate through the site. Accessibility issues that create friction – low colour contrast that makes content hard to read, auto-playing media that interrupts the user, forms with unclear labels that cause abandonment, keyboard navigation that traps users – all translate into worse engagement metrics.
Users encountering these issues do not file bug reports; they just leave. A high bounce rate and low dwell time on a page with strong content is often a usability problem in disguise. Fixing the accessibility issues that create that friction is one of the more reliable ways to improve engagement signals without changing the content itself.
Conclusion
The connection between accessibility and SEO is not a coincidence or a side effect, it’s structural. Both disciplines are asking the same question: can this page be understood by something that cannot see it? When the answer is no, both organic traffic and users with disabilities pay the price.
An accessibility audit and an SEO audit conducted separately will often surface the same underlying problems from different angles. Fixing them together is more efficient than treating them as unrelated work, and the compounding benefit to both discoverability and usability is considerably greater than either delivers alone.
