Asking customers how they heard about the business remains one of the cheapest and most revealing attribution methods. It complements digital data with the buyer’s perspective, and shows influences no pixel records, such as recommendations, radio or conversations.
The essentials in a definition
The “how did you hear about us” survey is a simple question, asked on the form or order, that asks the customer to state the contact’s origin. It complements digital attribution because it captures channels that leave no trace, such as referrals, radio, events or search in assistants. It cross-checks with GA4 data and conversion measurement.
Why it works
Digital data shows the last point of contact but not what sparked interest. The customer knows: it was a conversation with a friend, a video, an ad, an article. Asking fills the gap.
Many companies discover channels they had not counted, such as podcasts, events or recommendations, and re-evaluate how much ads weigh.
How to design the question
Keep it short, open-ended or with options plus a free field. Avoid huge lists. Place it somewhere natural: contact form, checkout, confirmation email, first sales conversation.
Use the same question for months, so you can compare over time.
An attribution survey that works
- Choose a short, fixed question
- Place it at the natural moment of conversion
- Group answers by theme every month
- Compare with platforms and analytics
How to analyse
Group answers by theme (search, social, referral, event, other). Compare with platform data. There will be differences: the customer may remember the last touch or a striking moment, not necessarily the most influential.
Treat the answers as one more source. When they match analytics, they confirm it. When they diverge, they raise questions.
The customer is the only source who saw the whole path.
Limits and cautions
People forget or simplify. They are not aware of every influence. They do not always answer. So this answer should not be the sole basis for decisions, but it works as a counterweight.
Make sure the field complies with data-protection rules and that answering is not mandatory.
Decision table
| Format | Advantage | Limit |
|---|---|---|
| List of options + “other” | Easy to analyse | May not include the right option |
| Free text | Reveals unexpected origins | Harder to group |
| Question on a call or meeting | More detail | Depends on who asks |
| Post-purchase email | Does not delay checkout | Lower response rate |
Common mistakes to avoid
- Confusing options. Keep them few and clear, and allow “other” and “don’t remember”.
- Not analysing. Review answers every month and group them into themes.
- Comparing without adjustment. Surveys under-represent some channels; use them as a complement.
How to measure the result
Group answers by theme, compare with the sources in GA4 and platforms, and track monthly evolution. Focus on discrepancies, which show underestimated channels.
Limits and exceptions
The source survey has biases: people remember the last or most striking contact, answer quickly and do not always know the real origin. Response rates vary. Use it as a complement, never as the sole source, and interpret trends rather than exact percentages. Combine with platform and analytics data for a more complete view.
Illustrative example
Illustrative example: a shop adds the source question to checkout, with optional free text. After two months, some answers mention “ChatGPT” or “an AI search”, a channel not appearing in reports. The shop starts measuring traffic from assistants and reinforces the content these assistants appear to use. Studies such as those from Think with Google help interpret behavioural changes.
In practice: checkpoints
Keep the question to one field, review the answers monthly and compare them with attributed sources, to see where they differ.
Frequently asked questions
Should the question be mandatory?
No. Keep it optional, so as not to harm conversion or answer quality.
Open answer or options?
A mix usually works: a few options plus a free field.
Can I use it in B2B?
Yes, in the first conversation or on the form.
Where should I place the question?
At checkout or on the form, as optional, or in a post-purchase message; avoid adding friction.
Do customers answer honestly?
Generally yes, but they remember the last or most striking one; use results as clues, not exact numbers.
A simple source question at checkout reveals channels digital attribution cannot see, such as referrals, events and answers from AI assistants.
Sources and recommended reading
Last editorial review: October 2026. Informational content; always confirm current conditions in the official sources before deciding.