Organic +1′s Will Also Show Up in Ads
What’s also interesting is that users don’t need to specifically endorse ads for their pluses appear on ads. Google’s Oestlien said that there’s a common infrastructure for social search/+1 on both the organic and paid sides. As a result user pluses in organic SERPs or on publisher sites away from Google will impact their appearance in paid search ads.
Here’s a concrete example: say I’m looking for places to stay in Lake Tahoe California for a family ski vacation. I visit a Marriott hotel site as part of my research and decide I like the hotel (so to speak). I then decide to click the +1 button on that Marriott page. If Marriott later incorporates the same URL in its paid search ad for Tahoe vacations my +1 will appear on that ad together with my name and avatar.

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To digress for a moment, there are three consumer experiences around +1:
- No Google account or not signed in
- Google account, signed in, but no Google Profile
- Google Profile holder
Those with Google Profiles can “plus” things; everyone else cannot. The next level down, Google account holders who are signed in will see all the +1′s and personalized “recommendations” even though they cannot add their own pluses without a Google Profile. It will look very much like Social Search does today. Finally, those not signed in or without a Google account will see aggregated +1 data but no personalized information: e.g., 10 users +1′d this (page or ad).
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Google Profile Adoption Challenge
Because publishers and webmasters will quickly realize the potential AdWords and organic benefits of +1 they will adopt the button. The bigger challenge for Google is on the consumer side.
Facebook had a massive installed base of users before the “Like” button was rolled out. Google will need to create that base as it rolls +1 out by getting people to sign up for Google Profiles.
Pluses will be counted as one of the signals that Google eventually uses to determine organic rankings. It’s less clear whether pluses will impact ads quality and paid rankings.