CPM
What it costs to have your ad appear a thousand times, however many people that reaches.
What it means
CPM is your ad spend divided by impressions, per thousand of them. Spend €2,000 for 500,000 impressions and CPM is €4.
An impression is one showing. If the same shopper sees your ad four times, that's four impressions and one person — CPM counts all four.
Show the math
Formula and a worked example
Ad Spend is everything the platform charged you in the period.
Impressions is how many times your ads were displayed — repeats to the same person included.
Worked example. You spend €2,000 for 500,000 impressions, so CPM = 2,000 ÷ 500,000 × 1,000 = €4. If 0.6% of those impressions become clicks, that's 3,000 clicks and a CPC of about 67 cents. Hold CPM at €4 but lift click-through to 1.2% and the same €2,000 buys 6,000 clicks at 33 cents — the auction price never moved.
Up is bad in isolation, but a dearer placement that gets clicked twice as often is still the better buy.
It answers the question
What am I paying for attention, before anyone acts on it? CPM prices the showing; whether the showing was worth buying is a question only CTRCTRWhether shoppers who see your ad in Amazon search results find it worth clicking. When it drops, look at your main image, title and price0.5% or more is healthy and what follows it can answer.
Why it matters
CPM is the wholesale price under every other advertising cost you pay. It sits one level below CPCCPCcheck both together.: you buy impressions, a fraction of them become clicks, and a fraction of those become orders. A rise here walks straight through to the cost of a click and then to the cost of an order, with nothing about your listing or landing page changed.
It also moves for reasons that have nothing to do with you. Q4, a competitor's launch, a new advertiser buying share in your category — all raise the price of the same shelf space. That makes CPM the first number to check when costs jump and your account did not change.
Two places in the app show it, and both use the same maths: Amazon prices the impressions its ads served, and the Meta ad-format table prices impressions per creative type. Compare each against its own history — the two platforms sell different inventory and their prices aren't interchangeable.
What good looks like
There's no published benchmark, because CPM is a category price rather than a skill score. Consumer electronics and supplements bid in a different world from niche craft supplies, and a €12 CPM is cheap in one and steep in the other.
Judge it against your own trend, and against what a thousand showings are worth to you: your click-through rate multiplied by what a click earns you is the ceiling before the impressions stop paying for themselves.
How to improve it
| Lever | What you do | Expect | How long | Watch out for |
|---|---|---|---|---|
| Fast Drop the premium placements | Cut bid modifiers for top-of-page or premium inventory that costs more without converting better | CPM down within days | 3–7 days | You slide down the page and impressions fall with you. The competitor taking the slot inherits your best-performing traffic. |
| Fast Cut the audiences that never respond | Exclude segments and placements accumulating impressions with no clicks behind them | CPM steady but wasted spend gone | 1 week | Narrowing usually raises CPM even as it improves results — a smaller, better audience is a more contested one. |
| Slow Earn a better price through relevance | Stronger creative and tighter targeting, so the platform rewards you with cheaper delivery | The same placements at a lower CPM | 3–6 weeks | New creative resets learning, so delivery gets worse and pricier for a week or two before it improves. |
| Slow Shift weight to cheaper inventory | Move budget toward formats and placements with less competition for the same audience | Blended CPM falls | 1 quarter | Cheap inventory converts worse. CPM improves on the dashboard while cost per order quietly gets worse — the saving shows first, the cost second. |
Every lever costs something somewhere. The last column is the one to read twice.
Read it with
CPM is the price of being seen. Whether being seen did anything is the number next to it.
Cheaper and more compelling
You're paying less per showing and a larger share of showings earn a click. Creative and auction are both working for you. Take the volume while it lasts.
Paying up for attention that works
The auction got dearer but your ads are landing better, which can fully absorb the rise. Normal in peak season. Set a ceiling before matching a competitor again.
Cheap and ignored
Cheaper showings that fewer people act on. Usually means delivery drifted to lower-quality placements. The saving is real; so is the drop in quality.
Squeezed from both ends
Each showing costs more and earns less. Often creative fatigue meeting a rising auction. Bidding harder makes it worse.
Ad spend is one multiplied by the other, so together they explain any budget change at a glance. Spend up with Impressions flat means the auction got dearer and you bought nothing extra. Spend up with CPM flat means you genuinely bought more reach.
On Meta, the gap between these two is how often you repeat yourself. CPM flat while CPP climbs means the price of attention hasn't moved — you've run out of new people and are paying to show the same ones again.
Common misreads
It tells you what showings cost. Show 100,000 people your ad three times and that's 300,000 impressions — the audience cost three times what CPM suggests. On Meta, CPPCPPCounts each person once, however many times they saw the ad, so it climbs as you push harder at a small audience. Check frequency when it rises is the number that prices people.
Cheap impressions are cheap for a reason — bottom-of-page slots, loosely related placements, disengaged audiences. A €2 CPM nobody clicks costs more per order than an €8 CPM that converts.
You don't set this price, the auction does. A rival's launch, a seasonal rush or a new advertiser in your category all raise CPM with your bids untouched. Check whether your bids actually changed before cutting them.
Also called
Cost per mille · cost per thousand impressions · cost per 1,000 impressions
See yoursYour cost per thousand impressions for the last 30 days, next to Impressions and Clicks.
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