High Accessibility is Effective SEO
Andy Hagans writes on why High Accessibility is Effective Search Engine Optimization:
On further reflection, this overlap makes sense. The goal of accessibility is to make web content accessible to as many people as possible, including those who experience that content under technical, physical, or other constraints. It may be useful to think of search engines as users with substantial constraints: they can’t read text in images, can’t interpret JavaScript or applets, and can’t “view” many other kinds of multimedia content. These are the types of problems that accessibility is supposed to solve in the first place.
He also demonstartes how using the Priority 1 checkpoints in the W3C Web Content Accessibility Guidelines.
Further down in the article he references Google's webmaster guidelines where the points parallel a W3C guideline.
Design and Content Guidelines:
- Make a site with a clear hierarchy and text links. Every page should be reachable from at least one static text link.
- Offer a site map to your users with links that point to the important parts of your site. If the site map is larger than 100 or so links, you may want to break the site map into separate pages.
- Create a useful, information-rich site, and write pages that clearly and accurately describe your content.
- Think about the words users would type to find your pages, and make sure that your site actually includes those words within it.
- Try to use text instead of images to display important names, content, or links. The Google crawler doesn’t recognize text contained in images.
- Make sure that your title and alt tags are descriptive and accurate. [...]
