Evidence bar
The minimum evidence before a decision may be made — usually a click count.
Derived from your own CVR rather than a round number, so the threshold reflects how your catalogue actually converts.
At an 8% conversion rate, ten clicks with no orders gives roughly 58% confidence the term is a dud; nineteen gives high confidence. Both are defensible choices — one acts sooner and is wrong more often. AutoPPC shows you the confidence attached to whatever number you pick.