Marketing decision log: a practical guide
Learn how to create a marketing decision log that connects each change to its reason, evidence, result and next decision.
Read the resource →Diffined field guide
Make every marketing lesson easier to find and reuse.
Practical, evidence-aware guidance for recording changes, running experiments, handing work over and making better decisions from what your team has already learned.
Browse the library
A focused knowledge base, not a content farm.
Every page supports a real Diffined workflow and links to the next useful step.
Guides
9Marketing change log: what to record and why
Build a useful marketing change log for website, campaign, pricing, email and offer changes without documenting every minor edit.
Read the resource →Marketing experiment log: turn tests into reusable learning
Structure a marketing experiment log that preserves hypotheses, conditions, results, evidence and decisions across teams and tools.
Read the resource →How to document marketing experiments without slowing the team
A step-by-step method for documenting marketing experiments quickly while preserving enough context to trust and reuse the result.
Read the resource →How to measure a marketing change without false certainty
Choose a useful comparison, label evidence honestly and reach a practical marketing decision without overstating causality.
Read the resource →Marketing handover checklist: preserve decisions, not just files
A marketing handover checklist for transferring active work, past decisions, evidence, unresolved questions and ownership.
Read the resource →Marketing institutional memory: stop relearning old lessons
Build marketing institutional memory that keeps decisions, evidence and lessons usable through staff, agency and platform changes.
Read the resource →Website change history for marketing teams
Create a website change history that connects page edits, conversion signals and the marketing reasons behind each decision.
Read the resource →Evidence levels for marketing decisions
Use clear marketing evidence levels to separate observation, comparison, experiment, qualitative insight and operational judgement.
Read the resource →Templates
3Marketing decision log template
Copy a practical marketing decision log template for website, campaign, offer, pricing and lifecycle changes, with evidence and follow-up built in.
Read the resource →Marketing experiment template: hypothesis to decision
A copyable marketing experiment template for planning, running, analysing and closing tests without losing the learning.
Read the resource →Before-and-after marketing change template
Capture a marketing change with an exact before and after, the reason, measurement window and evidence-backed next decision.
Read the resource →Use cases
4Marketing decision history for agencies and clients
Keep agency and client marketing decisions, rationale, approvals, evidence and handovers in one shared, readable history.
Read the resource →Marketing decision history for ecommerce teams
Track ecommerce offer, merchandising, pricing, campaign and conversion decisions with evidence and review dates across store and channel activity.
Read the resource →Marketing decision history for SaaS growth teams
Preserve SaaS positioning, acquisition, onboarding, pricing and lifecycle decisions so growth learning compounds across functions.
Read the resource →Marketing decision history for founders and small teams
A lightweight way for founders and small marketing teams to remember what changed, why and what happened next without adding heavy process.
Read the resource →Put the method to work
Record the next real decision.
The private alpha turns these principles into a searchable marketing history.
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