Churn

Churn is the rate at which customers cancel or stop paying over a given period. In a subscription business it is the counterweight to growth: even strong new-signup numbers do not add up if customers leave just as fast. It is usually expressed as a percentage of customers (or revenue) lost per month or year.

For SEO and marketing, churn is a reminder that acquisition quality matters as much as quantity: traffic and signups that are a poor fit for the product churn fast and destroy the economics. Attracting the right-fit customers through targeted, honest content — and setting accurate expectations pre-signup — reduces downstream churn. Retention content (onboarding, help, best-practices) is also an SEO surface that supports the paying base.

Senior practitioners connect top-of-funnel targeting to net revenue retention, recognising that SEO which floods signups with poor-fit users can quietly raise churn and wreck LTV even while the traffic chart looks great. They optimise for right-fit acquisition and lifetime value, not just volume, and treat retention and expansion content as part of the SEO remit — because in SaaS, keeping customers is where compounding growth actually comes from.