Lean Testing is a lightweight, agile approach to experimentation that focuses on running quick, low-cost tests to validate assumptions before committing major resources. Often used in growth marketing and product development, it prioritizes speed, learning, and iterative improvement over perfection. By testing one variable at a time with minimal investment, teams can identify what works early, reduce risk, and accelerate decision-making. Lean Testing is ideal for startups and fast-moving teams.
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