build-the-retention-engine

name	build-the-retention-engine
description	Read cohort retention and the repeat rate and build the second-purchase engine, since retention compounds LTV. Reach for this when growth depends on acquisition alone.

Skill: Build the retention engine

The average brand keeps ~28% for a second purchase; retention is the profit engine.

Step 1 — Measure cohort retention

Repeat-purchase rate and cohort curves (§3 #3).

Step 2 — Find the second-purchase gap

Where and why first-time buyers don't return.

Step 3 — Build the levers

Post-purchase flow, subscription, replenishment, loyalty.

Step 4 — Re-measure LTV

Track the repeat rate and its LTV impact.

Output

A cohort-retention read, the second-purchase gap, retention levers, and the LTV impact.