What is CTR?

Click-Through Rate

DEFINITION

Click-Through Rate (CTR) is the percentage of people who click your ad or link out of those who see it.

FORMULA

CTR = (Clicks ÷ Impressions) × 100

BENCHMARKS

Meta cold: 1-2% · Meta retargeting: 3-6% · Google Search: 3-6% · Google Display: 0.3-0.8% · Email: 1.5-3.5%

Why CTR matters

CTR measures creative quality + audience targeting fit. Low CTR means wrong message for the audience, weak creative, or both. Improving CTR is one of the fastest ways to lower CPM (since platforms reward engagement).

Worked example

Plug a real number into the formula to see CTR in action:

// Formula

CTR = (Clicks ÷ Impressions) × 100

// Example calculation

600 clicks ÷ 25,000 impressions = 2.4% CTR

Numbers are illustrative. Try our Customer LTV Calculator for your real numbers.

Common mistakes with CTR

1
Looking at single-channel ROAS in isolation instead of blended MER. Last-click attribution overweights bottom-funnel channels and starves top-of-funnel.
2
Setting a uniform target across products with different margins. A 2× ROAS is profitable on 80% margin and unprofitable on 20%.
3
Optimizing CAC without measuring LTV. Cheap customers with bad retention destroy unit economics.

How to improve CTR

Run incrementality tests every quarter to validate which channels actually drive new revenue vs steal credit.
Build a unit economics dashboard separating CAC, LTV, contribution margin, and payback by channel and cohort.
Establish a contribution margin floor for each channel — pause spend when margin drops below threshold for 14 days.