What does a CRO agency do, and when is it worth hiring one?

Nico Bértolo · 2026-10-05

In short

• CRO (conversion rate optimisation) means getting more visitors to buy without paying more to bring them in.
• A CRO agency finds where sales are lost, proposes changes and measures whether they work.
• It pays off once you have steady traffic.

If your store converts 1% and goes to 1.5%, you sell 50% more with the same traffic and ad spend. That is why CRO usually comes before increasing your ad budget.

1. Diagnose: Analytics, heatmaps and recordings to find where people drop off.
2. Change and test: Implement changes, ideally with A/B tests when traffic allows.
3. Measure: Conversion, average order value and revenue per visitor, before and after.

Frequently asked questions

What is a CRO agency?

An agency that increases the share of visitors who buy, by finding where sales are lost and measuring each change.