At SMX West, in the “Google Manual Actions” panel, Juan Felipe Rincon from Google said that Google takes action on 65 percent of the 35,000 user-generated spam reports submitted to Google monthly.
Juan Felipe Rincon gave that figure minutes ago in the panel. He added that of those 35,000 submissions, 65 percent are spam, so action is taken on a manual basis on those reports.
Juan Felipe Rincon added that they do prioritize spam reports based on how significant they can be on their users, Google searchers. He also added that some users are good at spam reporting, and they may prioritize spam reports when they know they are submitted by users who submit good spam reports.