User Acquisition & Retention

Getting users is hard. Keeping them is harder. In SV English, we use the "Pirate Metrics" (AARRR) to talk about this journey.

The AARRR Funnel

1. Acquisition: How do users find you? (SEO, Ads, Word of Mouth).
2. Activation: Do they have a great first experience? (The "Aha!" moment).
3. Retention: Do they come back?
4. Referral: Do they tell their friends?
5. Revenue: Do they pay you?

The Math of Growth

• CAC (Customer Acquisition Cost): How much you spend to get one new user.
• LTV (Lifetime Value): How much money that user will spend with you over their entire life as a customer.
• The Golden Rule: Your LTV should be at least 3x your CAC.

Retention vs. Churn

• Retention Rate: "Our 30-day retention is 40%." (40% of people who sign up are still here after a month).
• Churn Rate: "We need to reduce churn among our enterprise users." (Too many people are canceling their subscriptions).

Useful Phrases

• "We're seeing a drop-off at the signup page."
• "How can we incentivize referrals?"
• "Our organic acquisition is growing, which is a great sign."
• "We need to find the 'Aha!' moment for our new users."

Failure as learning

Startup culture treats failure differently from traditional business. A failed experiment is not a permanent defeat; it is a learning. The vocabulary frames setbacks as information.

• Instead of the experiment failed, say we learned that users don't want this feature.
• Instead of we wasted three months, say we validated our assumption was wrong, which saves us years.

This is not dishonest; it is the growth mindset. The phrase fail fast means try, learn quickly from what doesn't work, and move on. You will hear it often in startup English.

Build-measure-learn

The full cycle, popularized by Eric Ries in The Lean Startup, is build, measure, learn:

1. Build a small version (an MVP or a feature).
2. Measure how users respond (data, retention, feedback).
3. Learn whether your assumption was right.
4. Iterate based on the learning, or pivot if the whole direction is wrong.

Common mistakes

1. Using pivot for any small change. A pivot is strategic, not cosmetic. Changing a button color is an iteration, not a pivot.
2. Ship off. The verb is ship, not ship off.
3. Treating failure as final. In startup English, frame setbacks as learnings: we learned that...

Practice

Label each situation as an iteration or a pivot:

1. We changed the color and layout of the pricing page and tested it again. _
2. We stopped building our consumer app and started selling the same technology to businesses. _
3. We rewrote the signup flow to remove two steps. _

Answers: 1. iteration, 2. pivot, 3. iteration.

In the final lesson of this course, you will learn the Silicon Valley idioms and cultural phrases that appear constantly in startup conversations.