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>> CUTTS: BlindFiveYearOld in San Francisco asks "When did "Did you mean" search results
begin to be displayed? And what is the criteria for presenting "Did you mean" search results
above the normal search results?" The short answer is, it happened relatively recently.
I want to say like November issue 2008. So relatively recently, it's the first time you
might have seen it and when do we show it, when we were even more sure that there was
something really useful because not everybody clicks on the "Did you mean". They're not
savvy or they didn't see it. They get blindness and so they don't click on that result, which
is probably going to help them a lot. So if we think there is a high prior probability
that this will be very helpful suggestion to users, not just a normal search result
but really, really helpful, like they misspelled it badly or we think there's great results
waiting for them just around the corner, if only they will do this corrected search, then
we're willing to show this new user interface and it's not perfect, 100% of the time. You
can always use the plus sign or put a phrase or a keyword in double quotes, to do exactly
the search you wanted to do, but if we do have bad search results, we'll try to learn
that over time and improve on the individual algorithms but we have seen a real quality
improvement for the majority of users.