Before joining Optimizely, I spent six years at Google working on the Search Quality Team. Experimentation was a core tenet of our development process: every change to Google search results was A/B tested on a small fraction of users before launching to everyone. During my time there we made thousands of improvements to Google’s search results, each one scientifically tested, with measured impact
![Why Experiment Server-Side?](https://cdn-ak-scissors.b.st-hatena.com/image/square/1c3583f2f1c7c602761e4bafdf8ad5a9dd003ba7/height=288;version=1;width=512/https%3A%2F%2Fwww.optimizely.com%2Fcontentassets%2F14f7bb6071ef4ea7886f146067d77edf%2Fserver-side.png%3Fwidth%3D1200%26height%3D627%26rmode%3Dmax%26imagemode%3Dopengraph)