Definition
Conversion rate measures the share of people who take a predefined goal action - divided by total visitors. What counts as conversion depends on the funnel point: newsletter signup, contact request, demo booking, purchase.
Conversion rate is by far the cheapest growth lever. To double traffic, double acquisition budget. To raise CR from 1.5% to 3%, you have the same effect - without a single euro more in ad spend.
Conversion Rate Optimisation (CRO) is its own discipline: A/B tests, heatmaps, session recordings, funnel analysis, friction audits. Most common levers: fewer form fields, clearer headlines, more precise CTAs, faster page load.
Why it matters
CRO is the only marketing lever with linear ROI at falling risk - you work with existing traffic, every improvement compounds. Teams with mature CR culture scale pipelines without raising acquisition pressure.
In practice
- 01Booking form reduced from 7 to 3 fields: typically +20-40% submission rate.
- 02Above-the-fold CTA "Book demo" instead of "Learn more": +50-100% CTR is often measurable.
- 03Page load from 4s to 1.5s: +15-25% conversion (especially on mobile).
