What is conversion rate optimisation?
Conversion rate optimisation, or CRO, is the practice of getting more of your existing visitors to do what you want them to do. That might be making an enquiry, buying a product, signing up for a newsletter, or calling your business. The key word is "existing": CRO is about making better use of the traffic you already have, not buying more of it.
A simple example
If 100 people visit your website and 2 of them get in touch, your conversion rate is 2%. If you can change things so that 5 out of every 100 visitors get in touch, your conversion rate is 5%.
Same traffic. Same marketing budget. Two and a half times as many enquiries. That is what conversion rate optimisation looks like in practice.
The changes that move the needle are not always dramatic ones. Moving a button, rewriting a headline, adding a clear price, or removing a step from a form can each have a measurable effect. You do not need a redesign to improve your conversion rate. You need to understand where visitors are stalling and why.
Traffic problem vs conversion problem
A lot of businesses assume their website problem is about traffic. Sometimes it is. But often the issue is not that too few people are visiting; it is that too many of the people who do visit are leaving without taking action.
If your bounce rate is high on pages that should be engaging, if people are landing on your enquiry page but not completing the form, or if your product pages get visits but not orders, that is a conversion problem. Buying more traffic to send at a leaky bucket will not fix it. It will just make the problem more expensive.
What CRO actually involves
In practice, conversion rate optimisation involves looking at where visitors are dropping off, forming a view on why, and making changes to reduce that drop-off. This might mean improving the clarity of your messaging, making your calls to action more prominent, reducing friction in forms and checkout flows, or building trust through reviews and guarantees.
It is an ongoing process rather than a one-time fix. Visitor behaviour shifts over time, and what worked a couple of years ago may not work today. A UX audit is usually the starting point: it gives you a baseline understanding of where the conversion problems are before you start changing things.
Common questions
How do I know if I have a conversion problem?
If you are getting consistent traffic but not seeing enquiries or sales in proportion to it, that is the clearest sign. Other indicators include a high exit rate on pages that should be converting, forms that people start but do not finish, and product or service pages that receive visitors but produce no action.
Is conversion rate optimisation only for large websites?
No. The principles apply at any scale. A small business with 200 visitors a month still benefits from converting more of those visitors. The tactics available may be different: large sites can run formal A/B tests, which require significant traffic to produce reliable results, but the underlying logic of removing friction and improving clarity is the same.
What is a good conversion rate?
It varies significantly depending on the type of site and the type of conversion. A 2% to 5% conversion rate is often cited as a typical range for e-commerce. Service businesses asking for enquiries can expect higher rates if their site is doing its job well. The most useful benchmark is your own historical rate: if it is improving, you are moving in the right direction.
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