CPM, CTR, ROAS: the only Facebook ads metrics worth watching
2026-08-04A plain-language guide to the numbers in your dashboard, which ones actually mean something, and which ones are noise.
Ads Manager shows hundreds of columns. Roughly five of them matter for a small business. Here is what each one means and, more usefully, what you should do when it moves.
Cost per result
The most important number on the page. What one purchase, one lead or one signup costs you. Everything else is diagnostic; this is the score.
Compare it to what a customer is worth to you. If a customer is worth eighty euros over their life with you and you are acquiring them for thirty, nothing else on the dashboard needs your attention.
ROAS
Return on ad spend: revenue divided by spend. A ROAS of three means three euros back for every euro in. It only works if your pixel is reporting purchase values correctly, so treat a suspiciously perfect ROAS as a tracking question rather than a triumph.
Remember it measures revenue, not profit. A ROAS of two on a product with a fifty percent margin means you are breaking even.
CPM
Cost per thousand impressions: what attention costs in the auction you are competing in. Useful as context, not as a target. A rising CPM in December is the season, not a mistake.
Only act on CPM if it moves sharply while everything else stays still, which usually points at a targeting change or a much more competitive audience.
CTR
Click-through rate: the share of people who saw the ad and tapped it. This is a creative signal. A low CTR with high impressions means the ad is not interesting to the people seeing it, so change the image or the first line rather than the budget.
One to two percent is broadly healthy for a Feed placement, though it varies enormously by industry.
Frequency
How many times the average person has seen your ad. Below two is comfortable. Above three or four in a short window and you are wearing your audience out, which shows up first as a falling CTR and a rising cost per result.
The fix is a new creative, not a bigger budget.
What to ignore
Post reactions, page likes and comments are pleasant but rarely tell you anything about whether the campaign is working. Reach on its own is vanity. Do not optimise for a number that does not connect to revenue.