There's a number in Facebook Ads Manager that most authors watch obsessively.
Cost per click.
You'll see it posted in Facebook groups and forums. "Down to $0.12!" "Under 10 cents!" "Cracked it!"
And I get it.
It's a clean, simple number that goes up or down, and up feels bad and down feels good, and after a few weeks of running ads it becomes the number you check first when you open Ads Manager.
Here's the problem though. CPC is a vanity metric.
August 8th, 2026  •  4 minute read  •  Issue #166