We try our best to ensure that the data we publish are accurate and complete before, during, and after they are published. This page lists all of the corrections that we have made.
We may make changes that are not corrections. For example, our Traffic graphs do not show graphs of Google's actual traffic numbers. Rather, the graphs display interruptions in service that are specific to a geographic region. If changing how we generate the data will better serve that goal, we'll make the revision and add a note here to explain it.
By maintaining this change log, we hope to strike a balance between keeping a good historical record, and allowing ourselves to make improvements.
June 2012. For all three reporting periods between January 2010-June 2011, we updated the number of requests we received from the Spanish government. We also revised numbers of items requested to be removed for Argentina, Brazil, India and Italy during the January-June 2011 reporting period and added "Trademark" as a new category of removals starting with the July-December 2011 reporting period.
October 2011. We standardized how we categorize content removal requests by reason to better ensure consistency. Significantly fewer content removal requests were categorized as "Other" in the January-June 2011 reporting period as a result of this change.
May 2011. We updated our numbers for China to reflect actual numbers of content removal requests received. Chinese officials consider disclosing the nature of these requests to be state secrets, so we cannot do so at this time.
January 2011. Starting with the January-June 2011 reporting period, our counts of requests to remove content from Google's search products omit cases where the original content is no longer visible on the web, for instance, after the webmaster has removed it. (Such content may remain visible in Google's search index for a while after the original disappears, as a cached copy or search snippet.) A drop in the number of removal requests or the number of items requested to be removed between 2010 and 2011 could be explained by this change—for example in Korea, where many of our removals in response to government requests are removals of cached copies.
October 2010. We corrected the number of content removal requests that we received from Korea in the January - June 2010 reporting period.
Transparency Report