Google Accessible Search identifies and prioritizes search results that are more easily used by blind and visually impaired users – that means pages that are clean and simple (think of the Google homepage!) and that can load without images.
The article has some good tips (and motivation) for including accessibility in our website formulas. I particularly liked this quote,which we can all take to heart:
"...you can think of the Google crawler as the world's most influential blind user."