Growth hacking matters because conventional marketing channels become increasingly expensive and competitive as more companies pursue them, whilst creative alternatives often remain underexploited and disproportionately effective. When LinkedIn ads targeting CFOs cost £15 per click, the company that discovers a viral growth loop or strategic integration can acquire customers at fraction of competitors' costs, gaining decisive advantage. This efficiency particularly benefits resource-constrained organisations early-stage companies, bootstrapped firms, challenger brands that cannot outspend established players but can out-innovate them. Beyond cost savings, growth hacking builds a culture of experimentation that accelerates learning velocity: teams running ten experiments monthly discover what resonates 10x faster than those pontificating endlessly about single big campaigns. Research on breakout growth companies reveals they frequently deployed creative, unconventional tactics during early scaling rather than simply executing standard playbooks better. The methodology also creates compounding advantages: each successful experiment generates insights applicable beyond that specific test, building institutional knowledge competitors cannot easily copy. However, growth hacking requires discipline the temptation is chasing clever tricks rather than sustainable systems. Organisations that succeed treat growth hacking as systematic hypothesis testing, not random tactic generation, documenting failures as rigorously as wins to prevent repeated mistakes.