Advertising dashboards are designed to look busy. Dozens of numbers, charts, and percentages compete for your attention — and most of them won’t tell you what you need to know. You don’t need a data-science degree to run profitable ads. You need to watch a handful of numbers and ignore the rest.
The metrics that actually matter
- Conversions — the real results (leads, calls, sales). This is the whole point. If you’re not tracking it, nothing else below means much.
- Cost per conversion (CPA) — total spend divided by conversions. “Each lead costs me $28.” This is the number you compare against what a customer is worth.
- Conversion rate — of the people who clicked, what share converted. It tells you whether your landing page and offer are doing their job.
- Return on ad spend (ROAS) — revenue divided by ad spend, when you can attach revenue to conversions. The bottom-line test of profitability.
The vanity metrics to mostly ignore
These feel good and mean little on their own:
- Impressions — how many times an ad was shown. Reach isn’t revenue.
- Clicks and CTR alone — useful for diagnosing, but a high click-through rate that produces no conversions is just expensive curiosity.
- Likes, follows, “engagement” — fine as side effects, dangerous as goals.
None of these are useless — they help you diagnose problems. But they are means, not ends. The end is a conversion at an acceptable cost.
A two-minute weekly routine
- Look at conversions and cost per conversion for the week.
- Ask one question: is my cost per result below what a customer is worth to me?
- If yes, consider spending a little more. If no, look at conversion rate to see whether the problem is the ad (few clicks) or the page (clicks but no conversions).
- Change one thing, then wait for data before changing another.
A free Google Analytics property shows what people do after they click, and your platform’s own reporting — documented in the Google Ads Help center — handles conversions and cost. That’s genuinely all most small advertisers need.
If a number doesn’t change a decision you’d make, stop looking at it. Watch cost per result, compare it to customer value, and change one thing at a time.
New to all of this? Start with CPM vs. CPC vs. CPA to understand what you’re paying for, then plan your first campaign.