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"How can our ads have thousands of likes and hundreds of comments, yet sales are not growing?"
This is one of the most common traps in digital marketing. Many business owners judge campaign performance by reactions, reach or impressions. The problem is that likes, reach and comments do not pay the bills.
If you want to understand whether the money you invest in advertising generates results, you need to track different figures. And if you are wondering what ROAS means, it is one of the first concepts to understand.
Alongside ROAS, there are two other essential metrics: CPA and CAC. Together, they give you a much clearer view of advertising efficiency than any number of likes or views.
What ROAS is and how to calculate it
ROAS stands for Return On Ad Spend and measures how much revenue your ads generate for each RON spent.
ROAS = Revenue generated / Advertising cost
You invested 1,000 RON in advertising and generated sales of 6,000 RON.
ROAS = 6,000 / 1,000 = 6
In other words, for every 1 RON invested in advertising, you generated 6 RON in revenue. At first glance, that looks excellent. In many industries, it is.
Be careful, though: ROAS only measures the relationship between revenue and ad spend. It does not account for product margins, salaries, rent, logistics, returns or other operating costs. A high ROAS does not automatically mean profit.
That is why you also need to analyze other meaningful advertising metrics, not only revenue generated. If you want to understand how campaigns are optimized across different platforms, see how we approach Google Ads campaigns or how we manage Meta Ads performance.
Many business owners know their objectives but do not know whether their allocated budget is sufficient. For a realistic starting point, you can use our Free Meta Ads Budget Calculator from ALLSoft Agency. It works for both online stores and lead generation campaigns, helping you quickly estimate the daily budget you need based on your objectives.
What CPA is and why it matters more than ad cost
CPA means Cost Per Acquisition or Cost Per Action, and shows what it costs to get the desired result: an order, a lead or an appointment.
CPA = Advertising cost / Number of conversions
You invested 1,000 RON and received 20 orders.
CPA = 1,000 / 20 = 50 RON / order
Why does it matter? It lets you compare the cost of acquiring a customer with the profit that customer generates.
- If the average profit is 200 RON per order, a CPA of 50 RON is excellent.
- If the profit is only 30 RON, the same CPA means a loss.
Many business owners focus exclusively on daily campaign cost. In reality, ad cost tells you very little unless it is compared with the results obtained.
What CAC is and how it differs from CPA
CAC stands for Customer Acquisition Cost and represents the total cost of bringing in a new customer, not just advertising but everything acquisition involves.
CAC = Total marketing and sales cost / Number of new customers
1,000 RON advertising + 500 RON software + 1,500 RON operating costs = 3,000 RON total
30 new customers acquired β CAC = 100 RON / customer
The key difference: CPA measures the cost of a conversion generated by a campaign. CAC measures the real cost of customer acquisition across the business. You can have an excellent CPA and still have a CAC that is too high to be profitable.
What MER is and why it complements ROAS
MER stands for Marketing Efficiency Ratio. Here, it compares total commercial revenue with total advertising spend over the same period. Production, agency and sales costs are analyzed separately for profitability; if you use a different basis, state it explicitly.
MER = Total commercial revenue / Total advertising spend
MER does not tell you which channel produced a sale on its own, but reduces the risk of adding together conversions simultaneously attributed by Meta, Google and TikTok. For commercial decisions, start with store or CRM revenue and interpret each platform's reported contribution separately.
A useful threshold is calculated from contribution margin, returns, taxes, logistics, retention costs and the profit objective. There is no universally "good" ROAS, CPA, CAC or MER.
Why likes and reach do not pay the bills
Likes feel good. Comments feel good. High reach looks good in reports. But none of these figures guarantees sales.
We have seen campaigns with tens of thousands of interactions that produced almost no orders. We have also seen campaigns with very few reactions generating hundreds of thousands of RON in sales.
Vanity metrics create a false impression of success. A business owner sees a reach of 100,000, 5,000 likes and hundreds of comments, and assumes everything is going well. In reality, what matters is how many orders were generated, the CPA, the CAC and the ROAS.
Reach and interactions can provide context. They should never be the main criterion for judging campaign success.
ROAS / CPA / CAC comparison table
| Metric | Definition | Formula | What a good result means |
|---|---|---|---|
| ROAS | Revenue generated for each RON invested in ads | Revenue / Ad spend | The threshold is calculated from margins, costs, returns and the profit objective |
| CPA | The cost of a conversion or action | Ad spend / Conversions | Must be lower than the profit generated by the conversion |
| CAC | The total cost of acquiring a new customer | Total marketing cost / New customers | Must allow long-term profitability |
How to read a campaign report: what to watch and what to ignore
When you open a campaign report, start with the results that directly affect the business. First, look at conversions. Then check CPA. Next, analyze ROAS.
Only then is it worth checking CTR, reach, frequency or other secondary figures. Many businesses do the exact opposite, spending hours on impressions and engagement while ignoring the metrics that show whether ads make money.
Figures are also meaningful only when measured correctly. As you progress in digital marketing, you will discover an entire discipline devoted to tracking and data interpretation, just as you need to understand how much to allocate to advertising or the stages of the marketing funnel.
Frequently asked questions
There is no universal answer. A ROAS of 3 can be excellent for one business and insufficient for another. Everything depends on margins, operating costs and long-term customer value.
CPA measures the cost of a conversion generated by a campaign. CAC measures the total cost required to acquire a new customer across the whole business.
Yes. If margins are low or operating costs are high, an apparently good ROAS can hide an unprofitable business.
Conclusion
If you take just one thing away from this article: likes are not profit. ROAS, CPA, CAC and MER offer different perspectives, and the right decision comes from reconciling them with margins and real commercial revenue.
Understanding these metrics is the first step. The next is knowing whether the budget you are investing is enough for your objectives. You can use our Free Meta Ads Budget Calculator for a quick, realistic estimate.
We audit your account for free and show you where real growth opportunities exist, your ROAS and CPA, and where money is being lost.
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