How to measure the return on online advertising and identify the channels that generate sales?
Your company invests in Google Ads, Meta Ads or other channels and receives reports with clicks, enquiries and conversions. But when it comes to distributing the budget, you still do not know which campaigns generate sales and margin.
Measuring the return on online advertising means going beyond the ad dashboards. You need to relate investment, the behaviour of potential customers and actual revenue. That view of the whole journey guides our approach to Online Advertising.
Why do platform reports not show the full profitability?
Advertising reports help optimise campaigns, but they do not replace the company's sales and cost data.
A conversion may not be a sale
A campaign may count forms submitted, calls or quote requests as conversions. However, not all of those contacts become customers, and some may not even have the right profile.
For services, what matters is how many deals closed; for ecommerce, confirming orders, returns and margin.
The same sale can appear in more than one report
A potential customer may discover the company in an ad, come back through another channel and buy days later. Different platforms may attribute value to the same purchase according to their own attribution models and windows.
Adding up the sales attributed by the platforms is not the same as real turnover. Google Analytics attribution reports help you observe the different touchpoints, but they have limitations.
Which indicators should you track to measure the return on advertising?
The analysis should distinguish advertising efficiency, commercial conversion and profitability.
Indicator | What it lets you assess |
|---|---|
Advertising investment | How much was spent on each channel and campaign |
ROAS | Revenue attributed to ads divided by advertising investment |
Cost per lead | How much it costs to generate an enquiry, not necessarily a customer |
Customer acquisition cost (CAC) | How much it costs to win a new customer, according to the costs included in the calculation |
Commercial conversion rate | What share of enquiries turns into sales |
Contribution margin | How much is left of revenue after the relevant variable costs |
A high ROAS does not mean high profit
ROAS, or return on ad spend, compares the revenue attributed to campaigns with the amount spent on ads. It does not automatically deduct the cost of products, commissions, shipping or the other operating costs.
In an illustrative example, €8,000 of attributed sales and €2,000 of ads represent a ROAS of 4. If, besides the ads, the variable costs (products, shipping, commissions) are €5,500, €500 is left before fixed costs and taxes (8,000 − 2,000 − 5,500).
In B2B services, the return may appear later
An industrial company may receive a lead today, present a proposal the following month and close the sale much later. Assessing the campaign only on immediate sales can lead you to stop investment that is creating qualified opportunities.
It is important to track meetings, proposals and deals won, without confusing opportunities with realised revenue.
How do you identify the channels that really contribute to sales?
You need to cross-check campaign and sales data to make decisions with more confidence.
Relate campaigns and commercial results
It is important that the website and forms identify, where possible and appropriate, the source of enquiries. Then the sales process should record what happened to them: qualification, meeting, proposal, sale or loss of the opportunity.
A Custom CRM, or an existing CRM that is well configured, can make that tracking possible. The essential thing is to link each opportunity to its source.
Compare data without requiring all of it to match
The data from Google Ads, Google Analytics and the sales system may differ. The differences result, among other factors, from attribution rules, the periods considered and the date on which each system records a conversion.
Google Ads' own documentation distinguishes reports organised by click date from reports by conversion date. Confirm what each number measures and over what period.
Recognise the contribution of discovery channels
Not all ads exist to prompt an immediate purchase. Some introduce the brand to a new audience; others reach people already close to a decision.
If one channel starts opportunities that convert in another, assessing it only by the last interaction can lead to the wrong decision.
Where are the mistakes that waste budget?
Waste can lie in the measurement or in the process after the click.
- Optimising only for enquiries: the volume of leads grows without checking how many have commercial potential.
- Comparing platforms with different metrics: attributed conversions are treated as if they were unique, confirmed sales.
- Ignoring margins: products or services with high turnover but low return are favoured.
- Not following the sales team: the link between the campaign, the proposal and the sale is lost.
- Increasing the budget before fixing faults: more is invested to feed pages, forms or processes that convert poorly.
A Growth Consulting service can be useful when it is not yet clear whether the main bottleneck lies in the ads, the offer, conversion or sales follow-up. If the problem is identified, it may make more sense to act directly on that area.
How do you turn data into better investment decisions?
Measurement should support decisions about where to invest, not just produce reports.
Start by defining a common commercial reference: confirmed sales, net revenue, new customers and margin, depending on the business. Then compare it with acquisition data and track the progress of opportunities that have not yet closed.
If there is enough volume, test budget changes in a controlled way and observe the impact on total results, not just on the conversions attributed by a platform. Avoid changing several elements at once, because it becomes harder to tell what produced the difference.
At Norde, we analyse campaigns, pages and the sales process to understand where investment generates value and where opportunities are lost. For many SMEs, this joined-up view pays off more than optimising platforms in isolation.
Frequently asked questions
What is the difference between ROI and ROAS in online advertising?
ROAS relates the revenue attributed to advertising to the cost of the ads. ROI, or return on investment, seeks to assess net gain against the investment considered. To calculate ROI correctly, you need to define which costs and gains are included.
How do I know whether Google Ads or Meta Ads generates more sales?
Compare confirmed sales, customers acquired and the margin associated with each source, whenever that link is possible. Also consider each channel's contribution along the buying journey, rather than relying only on the totals each platform attributes to itself.
Can I measure the return on advertising without a CRM?
Yes, especially if the operation is simple and you can relate orders and investment using reliable data. When there are several sales stages, teams and proposals, a CRM tends to make it easier to follow opportunities and sales.
Why does Google Analytics show different sales from the advertising platforms?
Because the systems may use different attribution rules, recording dates and conversion windows. There are also limitations in data collection. Before comparing results, confirm that you are analysing the same events, periods and definitions.
Can Norde help identify which campaigns really generate sales?
Yes. We start by analysing the investment, the measurement data, the tools and the current sales process to understand where the gaps and opportunities are. For many SMEs, integrated management of advertising and sales tends to pay off more than analysing each channel in isolation. If correcting the measurement or organising existing reports better is enough, we will tell you frankly.
How can Norde help your company?
Measure the return by relating investment to sales and margin.
At Norde, we analyse campaigns and sales before recommending. Many SMEs benefit from integrated management; for others, simple adjustments are enough.
If you want to know which channels generate sales, talk to us: we reply within 24 hours and the conversation is without obligation. We work without lock-in and everything we build stays on your side. The Norde team brings more than 11 years of experience in digital.
Do you know which campaigns generate sales, or are you deciding based on clicks and separate reports?
We analyse acquisition, conversions and sales data to identify where it makes sense to invest.
