That link is broken. Here is the real link: https://static.googleusercontent.com/media/www.google.com/en...
FWIW, I find the original article easier to read than this SEO guide from Google. Google's guide has so many different methods of highlighting important body text (different combinations of bold, blue/dark blue/red, underlined, and yellow background!), it's difficult to read. Reminds me of amateur desktop publishing back in the 90's.