Overlapping concerns.
WHERE THEY OVERLAP
Alt text on images Clear heading structure Descriptive link text Readable contrast and font sizes Content available without JavaScript Logical page structure
Each of these serves both people using assistive technology and search engines trying to understand your content.
WHERE THEY DIFFER
Accessibility is about people being able to use your site. SEO is about being found.
Accessibility has legal dimensions in many jurisdictions. It is not merely an optimisation.
PRACTICAL MEASURES
Write descriptive alt text Use headings for structure, not styling Write link text describing the destination, not "click here" Ensure sufficient colour contrast Make forms usable by keyboard Provide captions or transcripts for video
TESTING
Automated accessibility checkers catch obvious problems. Actual testing with a keyboard, without a mouse, reveals more.
THE HONEST POSITION
Accessibility is worth doing because people need it. That it also helps search is a secondary benefit rather than the reason.
