The signs were all pointing this way.
Google announced Tuesday a change to the ad rotation settings in AdWords. There will soon be just two options: “Optimize: Prefer best performing ads” and the not-so-subtly named “Do not optimize: Rotate ads indefinitely.”
The change signals one more way machine learning is becoming ingrained through the AdWords platform.
For more on what this change entails, read the full article on Search Engine Land.