October 31st, 2011 | Published in Gmail (Google Mail)
We don’t want ads to be a mystery, so with our new “Why these ads” link, you can find out why an ad is being shown to you. By clicking the link - now next to ads in your Google search results and coming very soon to Gmail - you’ll be able to see information about why a specific ad appeared. In addition, we’re giving you greater control through our improved Ads Preferences Manager, where you’ll be able to block advertisers or turn off personalized ads.
To learn more, check out this video from our lead software engineer, Diane Tang, or read our post on The Official Google Blog.