Google Ads experiments now come with a new auto-apply feature, which will automatically apply experiment results by default. Advertisers can adjust the setting to require statistical significance at 80%, 85%, or 95% confidence levels or stick with the default directional results.
There are built-in safeguards. Any experiment metric that performs significantly worse in the treatment arm will prevent changes from auto-applying. However, there are only two success metrics that can be selected.
This update was discovered by Bob Meijer.