For agencies that grow D2C brands
What is an evidence trail, and why do brands ask for one?
An evidence trail links every number in a brand's report to the raw record it came from: the platform, the account, the date range and how the metric was counted. Anyone can click a figure and check it. It turns "trust us" into "check it", and it shows when two platforms disagree and why.
344k impressions in Google's AI results · Moolwan · one click from the record behind itGoogle Search Console · Generative AI features · 25 Jun–23 Sep 2026 · real data
What you'll see in 10 minutes
- Your first brand's report, built from its domain alone.
- Its ad accounts and GA4 connected, one secure sign-in each.
- Every number in the report with its source, date range and a link to the record behind it.
Why do brands stop trusting the numbers in agency reports?
Month-end review. The report says ROAS rose to 3.4×. The founder opens Ads Manager on her phone and sees 2.9×. Nobody in the room can say where 3.4× came from, which dates it covers or how it was counted.
One untraceable number taints the rest. After that meeting, every figure in every report gets questioned, and the brand starts asking for logins to check things itself. A number that carries its own source answers the question before it's asked. These are the parts a traceable number carries.
| Part | Example | Why it matters |
|---|---|---|
| Source and account | Search Console · the brand's property | Says who counted it |
| What the metric counts | Impressions in the Generative AI features report | The same word means different things on different platforms |
| Date range | 25 Jun–23 Sep 2026 | Stops two people comparing different weeks |
| Counting setting | 7-day click, 1-day view | Explains most gaps between platforms |
| Record link | The report or record ID it came from | Lets anyone check it without asking |
| When it was captured | Captured 26 Sep 2026, never overwritten | Shows the number wasn't changed later |
How do you build an evidence trail into a brand's report?
Attach the source to the number, not to the appendix. A sources page at the back of a deck rarely gets read. A short source line under each figure gets read every time. Work through these six habits and every number in the report can be checked on the spot.
Name the source under every number
Write the platform and account each figure came from directly beneath it, such as Meta Ads Manager for the brand's ad account or the brand's Search Console property. A number without a source is an opinion.
State the date range and time zone
Give the exact dates, not "last month", and note the account's time zone. Most disagreements about a number turn out to be about which days it covers.
Define each metric once
Say what the metric counts: purchases or all conversions, users or sessions, impressions in which report. The same word means different things on different platforms.
Write down the counting setting
Note the attribution setting or conversion window behind any ad platform figure. It explains most of the gap when two platforms disagree.
Keep the raw export, unchanged
Save the original export or record for every reported figure and never overwrite it. If a number is questioned months later, you can show exactly what the platform said at the time.
Link each number to its record
Give every figure a link or record ID that opens the source it came from. Anyone at the brand can then check it without asking you.
When two platforms report different figures for the same sales, the evidence trail shows why; to explain the gap to the brand, reconcile GA4, Meta and Google Ads. When a traced number has moved, the records point to the cause, and you can find why the brand's numbers moved.
Could the brand check this number in your report?
Test one figure before the next review. Pick a number from a brand's latest report and fill in what you know about it. The worksheet scores how traceable it is, lists what's missing and writes the source line to put under it.
Check whether a number is traceable
Leave a field empty if the report doesn't say. Each of the six parts counts once.
- counting setting
- record link or ID
source line to put under the number3.4× · Meta ROAS, purchase value ÷ spend · Meta Ads Manager · Dewleaf Skincare India · 1–30 Sep 2026
what to fixAdd the counting setting and the record link or ID, and anyone at the brand can check this number against the platform themselves.
Free, no login. The starting figure is an illustrative example. "Captured on" is optional and not scored, but it shows the number wasn't changed after the fact.
(login required) · In ai-dm, every number carries its source line and record link automatically.
How does ai-dm keep an evidence trail for every brand?
Every record kept as it arrived, every number linked to it. ai-dm stores each signal from a brand's connected accounts exactly as the platform sent it and never overwrites it. Every metric in the workspace, the reports and the portal clicks through to that raw record, with its source, account, date range and counting setting. The evidence trail is included on every plan.
6 numbers · 6 sources · strong and weak shown the same way
These six Moolwan numbers are real, each with its source: 344,000 impressions in Google's AI results (Search Console, 25 June–23 September 2026), 1,400 products ready for rich results with 24 of 1,424 items invalid and 1,380 valid merchant listings (Search Console, 26 September 2026), #2 of 17 in the Maps local pack (ai-dm, September 2026), a 2.13× Meta ROAS on ₹28,064 below a 4× benchmark (ai-dm, 30 days to 26 September 2026) and 368 new users from ChatGPT (GA4, 29 June–26 September 2026).
Decisions get the same treatment as numbers. When your team acts on a figure, the decision, the reason and the frozen baseline it will be judged against go on record, so you can show every decision and its outcome to the brand later. Each brand's records stay private to that brand, nothing changes in its accounts without your approval, and you can check how brand data is protected.
On our own brand. Every Moolwan number on this site carries its source and date, including the ones that aren't flattering, like the 2.13× Meta ROAS. You can inspect Moolwan's real numbers and follow each one to where it came from.
Related pages
Questions agencies ask about evidence trails
What is an evidence trail in marketing reporting?
An evidence trail links every number in a report to the raw record it came from: the platform, the account, the date range, how the metric was counted and when it was captured. Anyone reading the report can click a figure and check it, so the numbers no longer rest on the agency's word.
Why do brands ask agencies for the source of every number?
Because a number they can't check is a number they can't defend to their own team or investors. When one figure in a report turns out to be wrong or unexplained, every other figure becomes suspect. A source line under each number answers the question before it's asked.
What should the source line under a number include?
The metric's name and what it counts, the platform and account, the exact date range, any attribution or counting setting, and a link or ID for the record behind it. The worksheet on this page writes that line for you from a figure in your own report.
Does ai-dm change or overwrite a brand's raw data?
No. ai-dm stores every record exactly as it arrived and never overwrites it. Derived numbers, baselines and reports are built from those records and can be rebuilt from them, so any figure can be traced back to what the platform reported at the time.
Can a brand see the evidence trail behind its report?
Yes. Every figure in the reports and portal your team shares keeps its source line and record link, under your agency's name. Your team decides what goes into each report; the sources travel with the numbers.
Does ai-dm read the brand's Shopify revenue or orders?
No. ai-dm reads no order, revenue or customer data from Shopify. Its numbers come from the brand's connected marketing accounts, GA4 and its own tracking, each shown with its source.
What does the evidence trail cost?
The evidence trail is included on every plan. There's no plan to pick: sign up, pay as you go, and connect a brand's accounts with one secure sign-in each. Billed in USD and INR. Per-brand plans or pay as you go. A brand's data is deletable on request.
No plan to pick. Billed in USD and INR. A brand's data is deletable on request.