Thirty-nine million people are blind, and 325 million are visually impaired. Under the Americans with Disabilities Act (ADA), websites must be accessible to the visually impaired. Unfortunately, many websites neglect to make their content — both written and visual — accessible to the large population of potential customers with visual impairments. 

SEO can help with ADA compliance; there’s a significant overlap between SEO initiatives (images alt text, anchor links, heading tags, and more) and accessibility initiatives. 

Screen readers, for example, are similar to search engine crawlers in that they utilize page code to navigate and understand the content.