What Is Conversion Rate Optimization (CRO)?
Conversion rate optimization, or CRO, is the process of increasing the percentage of website visitors who take a desired action. That action, called a conversion, might be a purchase, a quote request, a phone call, or a newsletter sign-up. Instead of chasing more traffic, CRO makes the traffic you already have more valuable.
How conversion rate is calculated
Conversion rate is the number of conversions divided by the number of visitors (or sessions), usually shown as a percentage. If 1,000 visitors produce 20 enquiries, the conversion rate is 2 percent. What counts as good varies widely by industry, traffic source, and offer, so compare yourself with your own past performance rather than generic averages.
Start with a clear goal
Decide what a conversion is on your site, and which are most valuable. Start with the primary goal from your website goals. Set up tracking so you can count them. See website analytics basics.
Find where visitors drop off
Look at the journey: landing page, key pages, form or checkout. Where do people leave? Useful sources include:
- Analytics, showing pages with high exits and funnel drop-offs
- Heatmaps and recordings, showing where people click and scroll. See heatmaps
- Customer feedback, from surveys, calls, and emails
- Usability tests, where you watch real people attempt tasks
Common friction points
- Unclear headlines or offers
- Weak or missing calls to action
- Long, complicated forms
- Slow pages. See website speed
- Poor mobile experience. See the mobile-friendly checklist
- Lack of trust or proof. See social proof
- Confusing navigation. See navigation best practices
- Unanswered questions or hidden prices. See pricing page best practices
Form hypotheses
State what you will change, why, and what you expect: "Shortening the form from seven fields to four will increase submissions because people find it quicker." A hypothesis keeps testing focused on learning, not random tweaking.
Test changes
For sites with enough traffic, A/B testing compares two versions. For smaller sites, make one change at a time and compare before and after periods carefully, accounting for seasonality and traffic changes.
Prioritize
List ideas and rank them by likely impact, confidence, and effort. Fix obvious problems first, such as broken forms and slow pages, before testing finer details.
Keep the experience honest
Persuasion should help people make good decisions, not trick them. Misleading urgency, hidden costs, and fake scarcity may lift short-term numbers but damage trust and can break rules.
CRO and SEO work together
Better pages help both visitors and search performance. Clearer content, faster pages, and stronger structure benefit each. See what is SEO.
Make it a habit
Review your numbers monthly, pick one improvement, make it, and measure. Small gains compound.
The bottom line
CRO is about understanding why visitors do not act and removing the barriers. Measure, find friction, test, and repeat.