Most websites convert between 1 and 3 percent of their visitors. That means 97 or more out of every 100 people who visit your site leave without taking action.
A conversion rate optimisation (CRO) audit helps you understand why. It looks at how visitors behave on your site, where they drop off, and what changes are most likely to improve results. This article walks through a clear, repeatable process you can follow.
What is a CRO audit?
A CRO audit is a structured assessment of your website's ability to convert visitors into leads or customers. It goes beyond looking at traffic numbers and examines the quality of the user experience, the clarity of your messaging, the usability of your forms, and the effectiveness of your calls to action.
The output is a prioritised list of improvements, ranked by expected impact.
When should you run a CRO audit?
A CRO audit is worth doing:
- After a website redesign, to confirm the changes are helping rather than hurting conversions
- When traffic is holding steady but enquiries or sales have declined
- Before launching a major paid advertising campaign, so you are not driving traffic to pages that do not convert
- As a regular quarterly or annual review, regardless of whether you have noticed a specific problem
Step 1 — Set clear goals and define your KPIs
Before reviewing any data, establish what conversion means for your business. For an e-commerce site, a conversion is a purchase. For a professional services firm, it might be a contact form submission, a phone call or a booking.
From there, identify the specific metrics you will track: conversion rate by page, bounce rate on key landing pages, form completion rate, and time on page for high-value content.
Step 2 — Analyse traffic and user behaviour
Use your analytics platform to understand where visitors come from, which pages they land on, how long they stay and where they exit. Look for:
- Pages with high traffic but low conversion rates
- Pages with high exit rates where exits are unexpected
- Traffic sources that convert at significantly different rates from each other
This data tells you where to focus your attention. You want to find the pages with the most potential for improvement, not just the ones with the most visitors.
Step 3 — Review user behaviour with heatmaps and session recordings
Quantitative data tells you what is happening. Behavioural tools like heatmaps and session recordings tell you why.
Heatmaps show where users click, scroll and hover. Session recordings let you watch real user journeys through your site. Common findings include:
- Visitors clicking on non-clickable elements, which suggests they expect functionality that is not there
- Most users not scrolling far enough to see your CTA
- Confusion at specific form fields causing high abandonment
These insights are hard to get from analytics data alone.
Step 4 — Audit your conversion funnel
Map the steps a visitor needs to take to complete the desired action. For each step, look at the drop-off rate: what percentage of users move from one step to the next?
A significant drop at a particular step usually indicates a friction point. Common causes include:
- Asking for too much information in a form before the user is ready to commit
- Unclear value proposition on the page
- Slow page load time causing impatience
- Confusing navigation that interrupts the user journey
Step 5 — Assess content quality and CTA placement
Your content needs to answer the questions visitors have at the stage of the buying process where they encounter it. Early-stage visitors need education. Later-stage visitors need reassurance and clear next steps.
Check that your calls to action are prominent, specific and use action-oriented language. "Book a discovery call" performs differently from "Contact us". Test both.
Step 6 — Test forms and checkout processes
Forms are often the highest-friction element on a website. Audit each form for:
- Number of fields, fewer fields generally means higher completion rates
- Field labels and instructions, are they clear?
- Error messages, are they helpful or frustrating?
- Mobile usability, does the form work properly on a phone?
Step 7 — Check mobile performance
A significant proportion of website traffic in Australia arrives via mobile devices. If your site loads slowly or is difficult to use on a phone, you are losing conversions regardless of how good the desktop experience is.
Test your site on real devices, not just emulators.
Step 8 — Run A/B tests and track results
Use the findings from steps 1 to 7 to form hypotheses about what to test. A/B testing involves showing two versions of a page to different visitors and measuring which converts better.
Prioritise tests by the size of the audience affected and the expected size of the improvement. Run tests for long enough to reach statistical significance before drawing conclusions.
Step 9 — Repeat regularly
A CRO audit is not a one-time exercise. User expectations change, your product evolves and market conditions shift. A regular review cadence, at minimum once a year, ensures your website keeps pace.