Conversion rate optimization is the practice of increasing the percentage of visitors who take your desired action. It is often the highest-ROI marketing investment because it improves what you already have.
CRO is a process, not a hunch. The loop: research, hypothesize, test, learn.
The research phase
Find out why visitors do not convert.
- Analytics: where do people drop off?
- Heatmaps and recordings: what are they doing?
- User feedback: what do they say they want?
- Surveys: what stops them from buying?
The best CRO insights come from asking users directly. Analytics shows what happened; surveys explain why.
The hypothesis phase
Every test starts with a reason.
- Bad: "let us try a different button color."
- Good: "visitors who reach pricing bounce because the annual price is unclear; show a comparison table."
The testing phase
Test one variable against a control and let data decide.
- A/B tests need traffic to reach statistical significance.
- Start with high-impact pages: pricing, checkout, landing pages.
What to avoid
Avoid "peeking" at results early and calling it done. Run tests to completion, learn from losses, and bank the winners.
CRO FAQ
How much traffic do I need to test?
Roughly a few thousand visitors per variant for most tests. With less traffic, focus on qualitative research instead.
What is a good conversion rate?
It varies wildly by industry and action. Benchmark yourself against your own history, not generic averages.