Google

Just Testing: Google Users May See Up To A Dozen Experiments

Chemistry Lab Experiment FeaturedGoogle’s Chief Economist Hal Varian said during a Google Tech Talk on October 22, 2012 that Google users may see a dozen or more Google experiments per Google visit.

About 26 minutes into the Google Tech Talk, Hal said, “any time you access Google, you probably are in a dozen or more experiments.”

The talk was about how companies handle “big data,” such as testing various experiments and how to measure those results. So Hal gave an example that a single user may see a dozen or more experiments each time they use Google.

Google has gone on record with us dozens of times that they release about 500 updates to search per year. Hal went on to explain that they do 5,000 experiments in a year. On the ad side they may do 500 changes per year, like on the organic side.

Here is the video, skip to about 26 minutes in to jump to the specific point of this discussion:

Explore more on

Big data Google Google Search Hal Varian Search engine optimization
Add Search Engine Land as a preferred source on Google

Editorial disclosure

Search Engine Land is owned by Semrush. We remain committed to providing high-quality coverage of marketing topics. Unless otherwise noted, this page’s content was written by either an employee or a paid contractor of Semrush Inc.

About the author

Barry Schwartz
Barry Schwartz is a technologist and a Contributing Editor to Search Engine Land and a member of the programming team for SMX events. He owns RustyBrick, a NY based web consulting firm. He also runs Search Engine Roundtable, a popular search blog on very advanced SEM topics.

In 2019, Barry was awarded the Outstanding Community Services Award from Search Engine Land, in 2018 he was awarded the US Search Awards the "US Search Personality Of The Year," you can learn more over here and in 2023 he was listed as a top 50 most influential PPCer by Marketing O'Clock.

Barry can be followed on X here and you can learn more about Barry Schwartz over here or on his personal site.