Grow with paid ads
Spend that returns: the channels, metrics, and loops behind it.
4 steps to get you moving, each with a resource worth your time and more waiting underneath
Think of this as a friendly starting line, not the last word. Each step gives you the gist, then a resource worth your time from founders who've been there. There's always more underneath, more questions and more resources, whenever you feel like digging in.
-
1
Growth fundamentals & metrics
Measure what matters, grow what compounds.
What growth metrics should I actually track as an early-stage startup?The gist Track one North Star metric that captures real customer value (weekly active users, orders shipped, revenue retained) plus the inputs that move it. Ignore vanity numbers like total signups or app downloads; measure the point where users get value and how many come back. Fewer metrics, checked weekly, beat a 40-line dashboard nobody reads.
Growth Loops Are the New Funnels Reforge Blog The canonical explanation of why linear funnels break and self-reinforcing growth loops compound, from the team that trains growth leaders at top tech companies. -
2
Paid acquisition basics
Buy customers profitably, or don't buy them.
Should I even be running paid ads at this stage?The gist Only if you already have retention and a clear sense of what a customer is worth; otherwise you're paying to fill a leaky bucket. Most early startups can't profitably acquire on Meta or Google and should exhaust founder-led and organic channels first. Paid is an amplifier for something that already works, not a substitute for it.
Startup Handbook: Customer Acquisition Channels julian.com A blunt, practical guide from Demand Curve's founder on which paid and organic channels fit which business, and why most startups can't profitably buy ads early on. -
3
Unit economics & modeling
Know what a customer costs and earns.
What are unit economics and why do they matter?The gist Unit economics is the profit or loss on a single customer or unit, strip away the noise and ask 'do I make money on one customer?' If the answer is no and there's no clear path to yes, scaling just burns cash faster. Get the unit right first; growth multiplies whatever the unit is, good or bad.
16 Startup Metrics a16z The reference primer on the metrics and market-sizing logic investors use, including bottom-up market sizing that keeps founders honest about how big a market really is. Canonical a16z source. -
4
Retention, referral & virality
Keep them, and let them bring friends.
Why is retention more important than acquisition?The gist Retention is the foundation everything else stands on: without it, acquisition and referral just pour water into a leaky bucket. A flattening retention curve is the clearest proof of product-market fit and the thing that makes every growth loop compound. Fix retention before you spend a rupee on growth.
How the Best Companies Measure and Improve Retention Lenny's Newsletter Concrete retention benchmarks and cohort-analysis methods gathered from dozens of top companies, so you can tell a healthy retention curve from a dying one.
