Growth hacking guide
Growth hacking: frameworks, tactics, and metrics that actually work
Growth hacking is rapid experimentation across the full user journey to find scalable, repeatable ways to grow. It is not spam, virality tricks, or black-hat SEO. The best growth work is deeply analytical and relentlessly customer-focused.
What growth hacking actually is
The term was coined by Sean Ellis in 2010 to describe a mindset, not a bag of tricks.
Growth hackers run structured experiments at every stage of the user journey — acquisition, activation, retention, referral, and revenue. They measure everything, kill what does not work, and scale what does. The word “hacking” refers to creative problem-solving, not shortcuts. The best growth teams at companies like Airbnb, Facebook, and LinkedIn were full of engineers and data scientists running disciplined experiments — not marketers posting memes.
The AARRR funnel (Pirate Metrics)
Dave McClure's AARRR framework maps the five stages every user moves through. Most products leak badly at one or two of them — finding that leak is the growth team's first job.
Finding your growth lever
Most products have one metric that matters most right now. Your job is to find it.
Ask yourself: At what point in the funnel are we losing the most users? What is the one change that would have the biggest impact on that metric? That is your growth lever — pull it before spreading effort across multiple stages.
The growth experiment process
Every growth experiment follows the same structure — hypothesis, test, learn. One variable at a time.
Acquisition tactics by channel
Five channels most growth teams use — each with a different risk/reward profile.
Content / SEO
High leverage for SaaS. Slow to start, compounds over time. Write for search intent first — answer what users are already searching for.
Paid (Meta / Google)
Fast feedback, expensive. Works when LTV > CAC. Use it to validate messaging and test offers before investing in organic channels.
Referral
Best growth channel if your product is genuinely good. Dropbox gave extra storage; Uber gave free rides. The incentive must be tied to the product's core value.
Partnerships
Co-marketing, integrations, and distribution via complementary products. High ceiling, long sales cycles. Best when you have a clear audience overlap.
Community
Slack groups, Discord, Reddit. Long-term trust building. Expensive in human time, but community members convert and retain at rates that paid channels cannot match.
Common growth metrics
Growth teams live in these five numbers. Know them cold.
CAC (Customer Acquisition Cost)
What does it cost to acquire one paying customer? Include all sales and marketing spend divided by new customers in the period.
LTV (Lifetime Value)
How much revenue does a customer generate over their full relationship with you? LTV = ARPU × average customer lifespan.
LTV:CAC ratio
Should be 3:1 or higher for a healthy business. Below 1:1 and you are losing money on every customer you acquire.
Churn rate
Percentage of users who leave each period. Even small reductions in churn compound dramatically over time. Retention is the foundation of growth.
Viral coefficient (K)
K = (invites sent per user) × (conversion rate of invites). If K > 1, the product grows by itself. Most products have K < 1, which means other channels still matter.
Next steps
Learn growth analytics
Growth hacking without analytics is guessing. Learn how to instrument your product, read funnels, and make data-driven decisions with the product analytics guide.