Accessibility
WebAIM
Abbreviation for Web Accessibility In Mind
In short and in plain language
WebAIM is a group from America. It works for websites that everyone can use.
It gives advice and training on this.
Every year it checks a great many home pages. Then it writes down the errors it found.
Definition
WebAIM is a non-profit organisation based at Utah State University that advises and trains on web accessibility. Every year it tests a very large number of home pages for detectable barriers and publishes a report on the results.