One change. A clearer decision.
Turn an idea into a focused experiment you can run, review, and learn from.
Give your test a clear question.
Start blank or load an illustrative example. Your entries stay in this page’s memory; they are not submitted or saved. Download before leaving or reloading. Use aggregate or anonymized information.
One audience in a specific situation.
Name the real offer and where people will encounter the test.
Use an actual question, behavior, or report. Keep guesses separate.
If we change ___, we expect ___ because ___. This is a hypothesis, not a promise.
For example: show a sample deliverable before the booking link.
Name the numerator, denominator if relevant, source, and what counts. A click is not a booking.
Record the prior value, dates, and source, or explain why you do not have one.
What evidence would make you continue, revise, or stop? Agree before seeing results.
For example: stop if the copy creates confusion about scope or spending reaches the agreed limit.
When the test begins.
Allow for the buying cycle. A date does not establish statistical significance.
Your chosen currency, maximum cash outlay, and available hours. Zero spend is valid.
Who reviews the evidence and approves the next move?
Choose a bounded task, supplied inputs, and the person who checks its output.
Consider traffic source, timing, sample size, selection bias, or concurrent changes.
Before you use this plan
Still to fill: Who is this for?; Offer and channel; What have you observed?; Your hypothesis; One change to test; Primary measure and definition; Decision rule; Guardrail and stop condition; Start date; Review date; Time and spending limits; Decision owner.
This is a planning brief. It does not calculate sample size, statistical significance, or a winning variant.
Your experiment brief
Your report updates as you type and includes an AI prompt for critiquing the plan. Review it before copying it into an approved AI tool. Incomplete fields remain clearly marked in the export.
MARKETINGCOACH — CAMPAIGN EXPERIMENT BRIEF Draft based on your entries. Who is this for? [Not entered] Offer and channel [Not entered] What have you observed? [Not entered] Your hypothesis [Not entered] One change to test [Not entered] Primary measure and definition [Not entered] Baseline or what is unknown [Not entered] Decision rule [Not entered] Guardrail and stop condition [Not entered] Start date [Not entered] Review date [Not entered] Time and spending limits [Not entered] Decision owner [Not entered] Where AI can assist [Not entered] Limits and alternative explanations [Not entered] PREPARATION CHECK Missing: Who is this for? Missing: Offer and channel Missing: What have you observed? Missing: Your hypothesis Missing: One change to test Missing: Primary measure and definition Missing: Decision rule Missing: Guardrail and stop condition Missing: Start date Missing: Review date Missing: Time and spending limits Missing: Decision owner AI REVIEW PROMPT Using only this brief and verified evidence I provide, identify unclear definitions, missing inputs, and alternative explanations. Separate observations from hypotheses. Do not invent results, benchmarks, quotes, attribution, or a statistical winner. Suggest one bounded next investigation for human review. https://marketingcoach.cc/tools/campaign-experiment-builder
Start with the uncertainty.
Choose a question that could change your next decision. Define what you observed, what you suspect, the smallest useful action, and the evidence you will collect. A low-traffic business can learn from a few careful walkthroughs, while acknowledging that the feedback does not establish demand or a reliable conversion uplift.
Where AI helps
Use the included prompt to find unclear definitions and alternative explanations. Supply the actual offer, approved facts, and anonymized observations. You choose the hypothesis, verify evidence, approve spending, and decide what the result means.
Need help choosing what to test?
The Marketing Clarity Session helps you focus one audience and offer, choose three priorities, and agree on a practical next move.
Explore the $350 Clarity Session →What does this tool help you do?
Use this free builder to turn a marketing question into a testable hypothesis, one planned change, a primary measure, a guardrail, and a decision rule.
What will you leave with?
A campaign experiment brief and a prompt for reviewing gaps before the test starts.
Is it free? Do you need to sign up?
It is free to use, with no account or email required. Inputs stay in this page’s memory and are cleared when you reload or leave. Copy or export any work you want to keep. Tool inputs are not sent to an AI provider.
What should you check before using the result?
It structures your plan. It does not run campaigns, calculate statistical significance, or establish that a change caused a result.
Find the right tool for your next step →