Growth & Marketing

How do I know if my paid ads are actually profitable?

A starting point

Compare customer acquisition cost to the contribution margin a customer generates, and demand payback inside a few months (or a single order for D2C). If CAC exceeds what you earn back in a reasonable window, the channel is unprofitable no matter how good the click-through rate looks. Track blended and channel-level CAC separately.

Go deeper

Read

📄 Article
Free Beginner

Startup Handbook: Customer Acquisition Channels

From julian.com by Julian Shapiro Long-form guide

Why we picked it

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.

  • Most companies cannot profitably acquire on Meta/Google without high margins or strong referrals.
  • Match the channel to your product's format, targeting, audience, and device.
  • Great creative and a promise-keeping landing page beat obsessive targeting.
Open julian.com →
📄 Article
Freemium Intermediate

The North Star Playbook & Choosing Your Growth Metrics

From Lenny's Newsletter by Lenny Rachitsky ~20 min read

Why we picked it

Lenny distills how the best product teams pick a single North Star that captures real customer value and drives the whole growth model, with concrete company examples.

  • A good North Star metric measures delivered customer value, not vanity signups.
  • Break the North Star into a small set of input metrics you can actually move.
  • Fewer, well-chosen metrics reviewed weekly beat sprawling dashboards nobody reads.
Open lennysnewsletter.com →

People also ask

Should I even be running paid ads at this stage? 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 startu... Beginner 2 resources → What makes a paid ad actually convert? The creative does 80% of the work, not the targeting: a scroll-stopping hook, one clear promise, and a landing page that keeps the exact promise th... Beginner 2 resources → How do I pick which paid channel to start with? Match the channel to how people already look for what you sell: intent-driven search for problem-aware buyers, feed-based social for discovery and ... Intermediate 2 resources → How much budget do I need to test a paid channel properly? Enough to get a statistically real read, usually a few hundred conversions per channel before you judge it, not fifty dollars over a weekend. Set a... Intermediate 2 resources → How do Indian D2C brands keep paid acquisition sustainable as CACs rise? Winning Indian D2C brands stop renting attention and build owned media, content engines, and community so they aren't fully dependent on Meta and G... Intermediate 2 resources → What growth metrics should I actually track as an early-stage startup? Track one North Star metric that captures real customer value (weekly active users, orders shipped, revenue retained) plus the inputs that move it.... Beginner 3 resources →