From tweets from @Yoast and @aaronwall

www.google.com/intl/en_us/adwo ...

And,

google.nl/search?q=site:www.go">www.google.com/intl/en_us/adwo ... ...

Hmm link went wrong, then this one: yoa.st/hzp7k9

I wonder if these are examples for Adwords support.
www.google.com/intl/en_us/adwo ...

Good find, that looks to be it.

They are from 2006(!):
www.google.com/intl/en_us/adwo ...