Your Google Ads report says it brought in 30 leads. Your Facebook report says it brought in 25. Your website analytics says 35 people contacted you. Which is right? Probably none of them exactly. This is the attribution problem: figuring out which marketing deserves credit for a lead or a sale. It is messy, but you can get useful answers without a data science team.
Why attribution is hard
- People use several channels. A customer might see a Facebook ad, search your name on Google later, read reviews, and call after a friend's recommendation.
- Each platform grades its own homework. Ad platforms count conversions they influenced, so the same sale can be claimed by more than one.
- Privacy changes limit tracking. Browser and device restrictions mean some journeys cannot be traced.
- Phone calls and in-person visits are hard to link to online activity.
- Time lags. Someone may click an ad, and buy weeks later.
So a perfect answer is not possible. A useful, reasonably honest one is.
Common attribution approaches
Last click. The last thing someone clicked gets all the credit. Simple, but it undervalues earlier touches that built awareness.
First click. Credit goes to the first interaction. It values discovery but ignores what closed the sale.
Multi-touch. Credit is split across several interactions. More realistic, but requires better data.
Platform-reported. Each platform's own numbers, usually based on its own rules and attribution windows.
Different tools use different models, which is why numbers differ.
Practical ways to get a clearer picture
Ask customers. Add a "How did you hear about us?" question to your forms and phone scripts, and train your team to ask. Self-reported answers are imperfect, but they reveal channels that tracking misses, such as word of mouth and radio. Combine them with tracked data.
Use call tracking. For businesses that get calls, tracking numbers by source show which ads, keywords, and pages produce calls. Our guide to call tracking for Google Ads explains the basics.
Track forms and bookings in your CRM with a source field. Make sure every lead has a recorded source, and record outcomes: appointment, quote, sale.
Use consistent campaign tagging. Add tracking parameters to your ad links so analytics can tell where traffic came from.
Compare total results to total spend. When channel-level data is shaky, look at the whole picture. MER, total revenue divided by total marketing spend, is a blunt but honest check. Our free ROAS Calculator includes an MER section.
Test by turning things on and off. Pausing a channel for a short period, or running it in some areas and not others, shows how much it contributes. Do this carefully and only when you can tolerate the risk.
Watch for double counting
If Google, Facebook, and analytics each report the same conversions, adding them up overstates your results. Compare the sum of platform-reported conversions with the number of actual leads and sales you recorded. If the sum is much larger, platforms are overlapping.
What to do with imperfect data
You do not need perfect attribution to make good decisions.
- Look for patterns over time, not single-day swings
- Use more than one source of truth: platform data, call tracking, form data, and customer answers
- Focus on big differences, not tiny ones
- Judge by revenue and profit, not only attributed leads
- Be careful when cutting channels that assist others. Branded search and retargeting often get credit for sales that other channels started
Keep it simple
For most small businesses, a good approach is:
- Track calls and forms by source
- Record the source and outcome of every lead in one place
- Ask new customers how they found you
- Review monthly with spend and revenue
- Make gradual changes and watch the effect on total results
Do not forget the human side
Sometimes the answer is hidden in conversations. Ask your team which leads were best, and which ads or messages customers mention. Reviews and referrals count too.
Frequently asked questions
Each has trade-offs. Choose one consistently and combine it with other evidence.
Not to start. A spreadsheet, call tracking, and a CRM source field go a long way.
Different definitions, windows, and tracking. Ask them to reconcile the numbers with your records.
What to do next
If you want help sorting out which marketing is really working, book a free strategy call. We will look at your tracking and tell you what we would fix.
