Learning phase
The period after a change during which Meta is still working out who to show an ad to.
Every new ad set, and every meaningful edit to an existing one, starts here. Delivery is volatile, cost per result swings, and Meta is spending part of the budget on finding out. It exits after roughly fifty optimisation events in a week.
Why it matters for HVAC
That fifty-event threshold is the single most useful number for deciding whether Meta can work for a given contractor at a given budget. At a $60 cost per lead it needs about $3,000 a month per ad set to clear, which is why published minimums exist and why an agency that cannot explain its minimum in these terms has picked a number it liked.
It also explains the most common self-inflicted wound in this vertical: a contractor unhappy with week one results, changing the creative, the audience and the budget in week two, and resetting learning every time. The account never gets far enough to be judged.
How it is measured
Ads Manager labels ad sets in learning, and labels those that failed to exit as learning limited. Fifty events per ad set per week is the working floor. Below it, differences between ad sets are noise rather than findings.
A worked example
A contractor splits $3,000 across six tightly targeted ad sets. Each produces eight or nine leads a week, so none exits learning, and all six deliver erratically all month. The same $3,000 across two ad sets produces about twenty-five events each and both stabilise. Same money, and one of the two arrangements can actually be judged.
These figures are invented to show the arithmetic. They describe no real business.
Where this is demonstrated
The Advantage+ against manual pillar scores every listed agency on what they document here, and gives you the questions that tell you which one you are being sold.