Conversion Rate Optimization
Quick definition
Conversion rate optimization (CRO) is the systematic process of increasing the share of visitors who complete a desired action, such as buying or signing up, by understanding their behavior and testing improvements.
The CRO process
- Measure the current conversion rate and where visitors drop off.
- Research why, using analytics, session recordings or heatmaps, surveys and usability testing.
- Form a hypothesis, for example “shortening the form will increase sign-ups because it reduces effort”.
- Test the change, typically with an A/B test, and review the result.
- Roll out the winner and repeat.
What CRO looks at
- The clarity of the offer and headline.
- Calls to action.
- Form length and fields.
- Page speed.
- Trust signals such as reviews and guarantees.
- Checkout friction.
- The experience on mobile devices.
Caveats
A higher conversion rate is not always a better business outcome. A change that boosts sign-ups but brings in poor-fit customers can lower revenue per visitor. Judge changes against the business goal, and test with enough traffic to trust the result.
Example
A landing page converts 2% of visitors into trial sign-ups. Research shows many visitors abandon the long form. The team tests a version with three fields instead of seven, and if the shorter version converts at a higher rate over the planned test period, it replaces the original.