Why cpc matters
It sits between CPM and CPA, so it separates an attention problem from a conversion problem. Good CPM and bad CPC means the ad is not earning the click. Good CPC and bad CPA means the landing page or the offer is losing them.
What this looks like with real numbers
CPM of $12 and CTR of 1.5% gives a CPC of $0.80. If CPC doubles while CPM holds, the ad has stopped earning the click, which is a creative problem. If CPC holds while CPA doubles, the ad is fine and the page or the offer is losing people.
What it does not tell you
Platforms count several things as clicks, including expansions and profile taps. Use link clicks or outbound clicks if you intend to reason about traffic.
The mistake people actually make
Optimising CPC in isolation. Curiosity-gap hooks buy cheap clicks from people who never intended to buy anything.
Questions, answered.
How do you calculate cpc?
Spend ÷ clicks. The average cost of one click.
What goes wrong with cpc?
Optimising CPC in isolation. Curiosity-gap hooks buy cheap clicks from people who never intended to buy anything.
What does cpc not tell me?
Platforms count several things as clicks, including expansions and profile taps. Use link clicks or outbound clicks if you intend to reason about traffic.
Change the creative, not the dashboard
The average cost of one click.