A Beginner’s Guide to Conversion Rate Optimisation

Conversion rate optimisation sounds technical and intimidating. It’s actually straightforward: make it easier for people to do what they came to do. Everything else is detail. Here’s how to get started.

What CRO Actually Is

CRO is the practice of increasing the percentage of website visitors who complete a desired action — purchasing a product, signing up for a newsletter, filling out a contact form. It’s not about getting more traffic; it’s about getting more value from the traffic you already have.

Where to Start

1. Define Your Conversions

Before you can optimise, you need to know what you’re optimising for. Primary conversion (sale, sign-up) and micro-conversions (email click, add to basket) both matter. Map the full journey.

2. Identify Friction Points

Use analytics to find where people drop off. A 70% bounce rate on your pricing page tells you something’s wrong there. Heatmaps and session recordings show exactly where attention goes and where it’s lost.

3. Form Hypotheses

Don’t guess randomly. Form specific hypotheses: “If we reduce the checkout from 4 steps to 2, conversion rate will increase because we’re removing friction.” The hypothesis gives you something to test.

4. Test

A/B testing is the gold standard. Show version A to half your visitors and version B to the other half. Measure which performs better. Statistical significance matters — don’t declare a winner too early.

Quick Wins

• Page speed — Every second of load time costs conversions. Optimise images, minimise scripts, use caching
• CTA clarity — “Get Started” converts better than “Submit”. Make the action obvious
• Form length — Every field you remove increases completion. Only ask for what you genuinely need
• Social proof — Reviews, testimonials, and user counts reduce decision anxiety
• Mobile experience — Test your conversion flow on a phone. If it’s frustrating, fix it first

Building a CRO Culture

The best-performing websites aren’t the ones that ran one round of A/B tests. They’re the ones that test continuously — treating optimisation as an ongoing process rather than a project. Every change is tested, every result is documented, and every insight informs the next experiment.

Tools

You don’t need expensive tools to start. Google Analytics for data, Google Optimise (or its successor) for A/B testing, Hotjar for heatmaps and recordings. Start simple, invest in tools as your programme matures.