What is Conversion Rate?
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 does Conversion Rate matter?
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.
Conversion Rate 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).
From the journal
- Measure before the relaunch: those four numbers have an expiry dateAfter the rebuild you want to know whether it is better. The numbers that would answer that are still there today, but they expire: Google Analytics deletes event data after 2 or 14 months depending on the setting, the field data history reaches back 40 weeks, Search Console 16 months. Proving a 30 per cent improvement on 20 enquiries a month takes about 23 months of measurement.
- Landing page or homepage: where the ad should leadIn small accounts the ad almost always points at the homepage, because the homepage is already there. Yet 57 per cent of viewing time falls on the first screenful, and Google explicitly judges whether the destination meets the expectation your ad copy created. When a dedicated page earns its keep, when the service page you already have is enough, and from what volume you can test at all.
- Customer surveys that earn their keep: a number is not yet a findingWith 20 responses your NPS swings by plus/minus 32 points. At that size the metric no longer measures anything you could steer by. What the score actually does, why its inventor revised it in 2021, and which two sentences in a survey genuinely carry weight.
