Growth Experimentation
Growth experimentation is the skill of finding where a funnel actually leaks and testing fixes in the order that matters. It is assessed on diagnosis before intervention — most growth work fails because it optimises a step that was never the constraint.
Also called: growth hacking, conversion optimisation, growth marketing
What is growth experimentation?
This covers funnel analysis, locating the binding constraint, sizing the opportunity before building, designing a test that isolates the change, and reading the result without motivated reasoning.
Growth teams burn quarters optimising steps that were never the bottleneck. The ability to find the constraint before acting is what separates growth from activity.
What do the levels of growth experimentation mean?
Four levels, each defined by observable behaviour rather than by years. This is the definition employers set their bar against, and the one every proof is scored to.
- L1Aware
Can run standard optimisation tactics and read the outcome.
Evidence: Executed tests with results recorded.
- L2Working
Analyses the funnel to choose where to work rather than optimising the most visible step.
Evidence: A funnel analysis leading to a prioritised test.
- L3Independent
Identifies the binding constraint, sizes the opportunity before building, and designs tests that isolate the change.
Evidence: A constraint diagnosis with sizing, and a test that isolated the variable.
- L4Leading
Builds the growth model an organisation plans against and reallocates effort based on it.
Evidence: A growth model driving resourcing decisions.
| Level | Label | People proven here |
|---|---|---|
| L1 | Aware | 0 |
| L2 | Working | 0 |
| L3 | Independent | 1 |
| L4 | Leading | 0 |
How is growth experimentation assessed?
Candidates receive funnel data with a tempting but low-impact optimisation available and a less obvious structural constraint. Scoring rewards locating the real constraint, sizing before building, and a test design that isolates the change.
Which roles require growth experimentation?
| Role | Level required | Status |
|---|---|---|
| Growth Analyst | L3 Independent | Required |
How do you prove growth experimentation?
Growth Experimentation: questions people ask
- Is this a marketing skill?
- It sits across marketing, product, and data. The challenge is analytical, so people from data and product backgrounds often score highly without any marketing title.
- What is the most common failure?
- Jumping to the visible optimisation. The brief deliberately offers a tempting low-impact fix; taking it caps the score at Level 2.
- Do I need to have owned a growth number?
- No. The rubric scores diagnosis and test design, both of which you can demonstrate on the supplied data without prior ownership.