Conversion rate optimisation (CRO) lifts the proportion of your Australian visitors who buy, enquire or book, by tracing the point where they give up and testing a change that removes the reason. Because it works on visitors you already attract, each gain cuts what a new customer costs you in Google Ads, SEO and content. Ahrefs' Australian database records about 1,100 searches a month for "conversion rate optimisation". This guide covers the conversion rate formula, the spots where Australian buyers abandon a purchase, testing that stays on the right side of Google Search and consumer law, and the tools for each task.
See how Aemorph builds landing pages for Australian paid search
What Is Conversion Rate Optimisation?
CRO is a loop rather than a one-off fix: you measure where people leave, propose a reason, test a change against the current page and keep it only if more people convert. A conversion is whichever visitor action you have decided matters to the business. Good programmes begin with evidence about your own buyers, since a tweak that lifts sales for one Australian retailer leaves another untouched.
What counts as a conversion?
Any action a page is built to produce counts: an order on a product page, a quote request on a trades site, an appointment on a clinic page or a call placed from a mobile ad. In Google Analytics, the events you flag as important are called "key events". Google now reserves "conversion" for an important action you use to judge ad campaigns and guide bidding, created from a key event in Google Analytics so that Analytics and Google Ads count it the same way (Analytics Help, Conversions vs key events).
| Conversion | Australian example | Type | Where you track it | What it signals |
|---|---|---|---|---|
| Purchase | An order paid through the online store | Primary | Store platform plus a Google Analytics key event | Revenue from the visit |
| Enquiry form | A quote request for a kitchen renovation | Primary | Form submission flagged as a key event | A sales lead |
| Booking | A physio appointment booked online | Primary | Booking confirmation page | A customer who has committed |
| Phone call | A tap on the phone number in a mobile ad | Primary | Call tracking in Google Ads | A lead who preferred to talk |
| Account or trial sign-up | A free trial of a software product | Secondary | Sign-up event | Interest to follow up |
| Newsletter sign-up | An email address entered in the footer | Secondary | Form submission event | Consent to keep in touch |
Typical conversions on Australian sites and where each one is tracked.
Source: Google Analytics Help, October 2026
CRO in Australia: Online Spending, Devices and the New Consumer Rules
More of Australia's shopping happens online every year and phones now carry as many page views as computers, so a checkout that frustrates on either screen loses a growing share of sales. The Australian Bureau of Statistics recorded 11.4% of retail turnover as online sales in 2024, up from 2.7% in 2014, in the final edition of its monthly Retail Trade series (ABS, Retail Trade: 75 years of retail statistics). StatCounter put mobile at 48.57% and desktop at 48.48% of Australian page views in September 2026.
| Measure | Figure | Market | Period | Source |
|---|---|---|---|---|
| Online share of retail turnover | 11.4% | Australia | 2024 | ABS |
| Online share of retail turnover | 2.7% | Australia | 2014 | ABS |
| Mobile share of page views | 48.57% | Australia | September 2026 | StatCounter |
| Desktop share of page views | 48.48% | Australia | September 2026 | StatCounter |
| Searches for "conversion rate optimisation" | 1,100 a month | Australia | October 2026 | Ahrefs |
| Searches for "a/b testing" | 800 a month | Australia | October 2026 | Ahrefs |
Sources: ABS, July 2025 and others
Australia's new unfair trading law reaches straight into checkout and page design, so CRO tactics that pressure buyers or hide fees carry legal risk from 1 July 2027. The Competition and Consumer Amendment (Unfair Trading Practices) Act 2026 passed both Houses on 2 July 2026 and received assent on 6 July 2026. It adds a general prohibition on unfair trading practices, requires a business advertising a base price to disclose transaction-based charges such as booking and service fees alongside it, and requires an easy way to cancel a subscription; the Parliamentary Library's Bills Digest gives 1 July 2027 as the commencement date (Parliament of Australia, Bills Digest). The Treasury minister described the target as including digital design that puts consumers under unreasonable pressure. This is Aemorph's reading of the law at October 2026, as general information rather than legal advice.
Sources: Parliament of Australia, 2026 and others
How Do You Calculate Conversion Rate?
Divide the conversions in a period by the visits, sessions or ad interactions in that same period, then multiply by 100. Google Ads counts ad interactions as the base, so 50 conversions from 1,000 interactions gives 5% (Google Ads Help, Conversion rate). Google Analytics reports session key event rate, the share of sessions in which any key event was triggered, and user key event rate, the share of users who triggered one (Google Analytics, API dimensions and metrics). A session holding two orders counts once, so dividing key events by sessions produces a different figure; name the key event each report tracks.
Conversion rate = (conversions ÷ visits, sessions or interactions) × 100
| Base | Formula | Worked example | Use it for | Report to open |
|---|---|---|---|---|
| Ad interactions | Conversions ÷ ad clicks or interactions × 100 | 50 ÷ 1,000 = 5% | Ranking ads, keywords and campaigns inside Google Ads | Google Ads campaign and keyword reports |
| Sessions | Sessions with the chosen key event ÷ all sessions × 100 | 120 ÷ 6,000 = 2% | Following the whole site month by month | Session key event rate in Google Analytics |
| Users | Users who converted ÷ total users × 100 | 90 ÷ 4,500 = 2% | Counting people who convert, whatever their number of visits | Google Analytics user reports |
| Page visitors | Conversions on one page ÷ that page's visitors × 100 | 15 ÷ 100 = 15% | Judging a single landing page or form | The page report or the testing tool |
Keep one base per report: switching bases moves the rate even when nothing else changed.
Source: Google Ads Help, October 2026
What is a good conversion rate?
The rate worth chasing is your own: a page beats its baseline for the same traffic source and device, regardless of what industry averages say. Published averages blend sectors, price points and different definitions of a conversion. Aemorph's 2024 version of this guide cited a 2.9% average across 14 industries from Ruler Analytics' pooled research; it is gone because an older average across mixed industries, built on its own sample and conversion definitions, sets no target for an Australian page. Log each key page's current rate for at least one full month, then measure every change against it.
Where Do Visitors Drop Out Before Converting?
Buyers walk away at the step that asks for more cash, effort or trust than they expected, and for online stores that step is usually the checkout. Baymard Institute averages 50 separate studies to arrive at a documented cart abandonment rate of 70.22% (Baymard Institute, Cart abandonment rate statistics). Some of that is window shopping: 42% of the shoppers in Baymard's 2026 survey had left a cart simply because they were browsing.
| Why shoppers abandoned a purchase at checkout | Share of US online shoppers | What an Australian store tests | Objection type | Page to change |
|---|---|---|---|---|
| Extra costs too high (shipping, tax, fees) | 40% | Show delivery and any card surcharge on the product page | Cost | Product page |
| Delivery too slow | 20% | Give delivery estimates by state or postcode before checkout | Delivery | Product and cart pages |
| Did not trust the site with card details | 19% | Display familiar payment options and security cues near the card fields | Trust | Payment step |
| Had to create an account | 18% | Let buyers check out as a guest | Effort | Checkout start |
| Checkout too long or complicated | 17% | Strip out fields the business never uses | Effort | Whole checkout |
| Website had errors or crashed | 17% | Run the checkout on every major phone and browser before each sale period | Reliability | Whole checkout |
| Returns policy not satisfactory | 13% | Link the returns policy from the cart | Policy | Cart |
| Total cost not visible upfront | 12% | Keep a running total, with delivery, from the cart onward | Cost | Cart and checkout |
| Not enough payment methods | 9% | Offer the payment methods your buyers already use | Payment | Payment step |
Baymard Institute, 2026 survey of 1,083 US adults who had shopped online in the previous three months; respondents picked every reason that applied. Baymard has not published an Australian equivalent, so read these as a guide to the objections, not Australian percentages. The last three columns are Aemorph's.
Source: Baymard Institute, 2026
How short does a checkout need to be?
Baymard's usability testing shows a well-designed checkout needs only 12 to 14 form elements, whereas the average US checkout displays 23.48. Baymard puts the average gain for a large ecommerce site at a 35.26% higher conversion rate once the checkout problems it has catalogued are fixed. Count every field your Australian checkout shows, drop the ones nobody uses, and test the lean version against the current one.
How do you find the leaks on your own site?
Pair data that shows where buyers leave with observation that reveals why.
- Funnel reports. Your analytics funnel shows which step, from landing page to thank-you page, loses the most people.
- Heatmaps and scroll maps. These reveal what visitors click, skip or never scroll far enough to see.
- Session recordings. Replays expose hesitation, repeated clicks and form errors that summary numbers miss.
- Exit surveys and customer calls. Buyers who tell you what stopped them hand you the objection in plain words.
- Usability sessions. A handful of people completing a real task on your site show you where they get stuck.
- Field-level form data. It pinpoints the exact question that makes people quit.
How Do You Run an A/B Test?
An A/B test divides traffic between the current page and a changed version over the same dates, so any difference in conversion rate comes from the change rather than a public holiday or a sale. A multivariate test alters several elements together and needs a far larger audience before it gives a dependable answer, which rules it out for most Australian small business sites.
- State a hypothesis. Name the change, the reason and the result you expect, such as "showing delivery costs by state on the product page lowers checkout abandonment".
- Pick one success metric. Choose the conversion the change aims at, and set the sample size and run time before you start.
- Split visitors at random. Each visitor sees either the original or the variation, and keeps seeing the same one.
- Cover full weeks. Weekend and weekday buyers act differently, so stopping mid-week compares mismatched audiences.
- Check the outcome once. End at the planned sample size, not the first day the variation looks ahead, then adopt or drop the change.
- Keep a test log. Recording winners and losers stops your team retesting an idea that already failed.
Does A/B testing affect SEO?
Testing barely touches your Google rankings when you follow Google's four rules: no cloaking, a rel="canonical" link from each test URL back to the original, temporary 302 redirects rather than 301s, and an end date as soon as the test has an answer. Google says small content variations generally do not significantly affect search performance, but warns that a test running far longer than needed risks being seen as deceptive (Google Search Central, A/B testing best practices).
How do you test landing pages for paid search?
Google Ads experiments divide traffic or budget between your existing campaign and a trial copy, which makes them the tidiest way to pit a new Australian landing page against the old one. Google names landing pages among the settings that custom experiments for Search and Display campaigns usually test, alongside Smart Bidding, keyword match types, audiences and ad groups; if the trial performs better, you apply its settings to the original campaign (Google Ads Help, About the Experiments page).
Sources: Google Search Central, October 2026 and others
Which CRO Techniques Lift Conversion Rates?
Each technique that works answers one buyer objection: unclear value, a surprise cost, missing trust, too much effort or a page that crawls on mobile.
| Technique | Objection it answers | Where it applies | First test | Metric that shows the effect |
|---|---|---|---|---|
| Plain headline and offer | "Is this for me?" | Homepage and landing pages | A headline naming the buyer's problem against one naming the product | Click-through to the next page |
| Outcome-led calls to action | "What happens if I click?" | Any page with a conversion | Button text such as "Get my quote" instead of "Submit" | Call-to-action click rate |
| Full price shown early | "What do I pay in the end?" | Product pages and cart | Total including delivery and surcharges shown before checkout | Cart-to-checkout rate |
| Reviews, case studies and guarantees | "Have others had a good experience?" | Product, service and checkout pages | Proof placed next to the call to action | Conversion rate on the page |
| Shorter forms | "This takes too long" | Forms and checkout | Fewer fields and guest checkout | Form completion rate |
| Site search | "Where is the thing I want?" | Online shops and large sites | Search box position; results for misspellings and Australian terms | Searches that end in a product view |
| Fast, mobile-friendly pages | "This is slow on my phone" | Every page | A lighter hero image and fewer blocking scripts | Mobile conversion rate |
| Personalisation | "This is not aimed at me" | Returning visitors and state-specific pages | Content matched to the visitor's state or earlier visits | Conversion rate of the targeted group |
The objection each technique answers and the first test to run on an Australian site.
How do calls to action convert better?
A call to action works harder when it names what happens next, appears where the reader finishes, and has no competing primary button nearby. Aemorph's 2024 version of this guide suggested scarcity tactics; under the Australian Consumer Law, urgency is safe only when it is real. The Federal Court ordered ticket reseller Viagogo to pay $7 million in 2020 after finding it had misled buyers by suggesting tickets were scarce and by leaving fees, among them a 27.6% booking fee, until late in the booking process (ACCC, Viagogo to pay $7 million). Fake stock counters, timers that reset and late-added fees put a business in the same position, and from 1 July 2027 the unfair trading practices prohibition adds a second test for pressure-based design.
Does page speed affect conversions and rankings?
A fast page that works on a phone helps buyers convert and helps Google rank it, since Google's core ranking systems look to reward content that provides a good page experience. Google's checklist covers good Core Web Vitals, secure delivery, a layout that displays well on mobile devices, no intrusive interstitials and main content that stands apart from everything else, and Google assesses these page by page (Google Search Central, Understanding page experience). The 2024 version of this guide said CRO itself improves rankings; Google's page experience guidance never mentions conversion rate, so the overlap lies in the page experience, not the rate. With Australian page views split almost evenly between mobile and desktop, test every change on both. Aemorph's guide to mobile SEO covers mobile-first indexing and the checks a phone layout needs.
When does personalisation help?
Personalisation changes what a visitor sees based on location, device, traffic source or earlier visits, and it justifies its cost only after a test shows the tailored version beats the standard one. For Australian businesses the easy wins are state-specific delivery and pricing information, and ads that land on a page repeating the ad's wording.
Which Pages Come First in CRO?
Begin with the pages nearest to revenue that carry real traffic: checkout and enquiry forms, then paid search landing pages, then product and service pages, then the homepage and blog.
| Page | What it has to do | Tests to run first | Number to watch | Priority |
|---|---|---|---|---|
| Checkout and forms | Close the sale or enquiry | Field count, guest checkout, the full price shown early | Form completion rate | 1 |
| Paid search landing page | Convert a paid click | Wording that matches the ad, one call to action, mobile load time | Conversion rate per click | 2 |
| Product or service page | Answer the buyer's questions | Price, delivery by state, proof, the next step | Add-to-cart or enquiry rate | 3 |
| Homepage | Route visitors to the right page | Headline, menu, the main call to action | Clicks through to key pages | 4 |
| Blog and guides | Turn readers into enquiries | An offer that fits the article, links to the next step | Clicks to service pages | 5 |
A starting order for Australian sites, closest to revenue first.
What makes a paid search landing page convert?
A paid search landing page converts when it repeats what the ad promised, answers the search without detours and asks for a single action. Landing page experience is one of the three parts of Google's Quality Score for Search campaigns, described by Google as how relevant and useful your landing page is to people who click your ad (Google Ads Help, About Quality Score). Aemorph builds dedicated landing pages for your ad campaigns and audits them for conversion rate, user experience and message match, because a strong ad sent to a weak page wastes the click you paid for.
Which CRO Tools Do You Need?
An effective CRO toolkit does four jobs: analytics for the numbers, heatmaps and recordings for behaviour, a testing platform for experiments, and Google Ads experiments for paid visitors. Google Optimize, still named in many older Australian guides, closed on 30 September 2023, and Google now directs Google Analytics users to testing integrations with AB Tasty, Optimizely and VWO (Analytics Help, Google Optimize sunset).
| Tool type | What it reveals | Examples | Use it to | Stage of the CRO cycle |
|---|---|---|---|---|
| Web analytics | Traffic, key events and funnel drop-off | Google Analytics | Locate the step where buyers leave | Measure |
| Heatmaps and session recordings | Clicks, scroll depth and replayed visits | Hotjar, Crazy Egg | Understand why buyers leave | Diagnose |
| A/B testing platform | Results of controlled experiments | AB Tasty, Optimizely, VWO | Prove which version converts better | Test |
| Product analytics | Automatically captured interactions | Heap | Answer behaviour questions without adding tracking code | Diagnose |
| Ad platform experiments | Original campaign against a trial campaign | Google Ads experiments | Test landing pages and bidding for paid traffic | Test paid traffic |
Tool types, the tools Aemorph's 2024 guide named, and Google's own testing integrations.
Sources: Google Analytics Help, October 2026 and others
Turn More of Your Australian Visitors Into Customers
CRO earns its keep when it runs in a set order: record a baseline, find the step where buyers quit, test one change and keep only the winners. Clear up surprise costs and long forms before you test button colours, use Google Ads experiments for paid landing pages, and check that pricing and urgency claims meet the Australian Consumer Law and the 2027 unfair trading rules. If paid search is where you want more conversions, Aemorph's SEM service builds your landing page and your Google Ads campaigns, then runs them for your first month with no management fee while you fund the ad spend. The what is digital marketing guide places CRO among the other channels, and the SEO service brings the organic visitors these pages convert. Aemorph is headquartered in Singapore and has no office in Australia.
This guide sets out Aemorph's reading of the Australian rules it mentions, current at October 2026. It is general information, not legal advice; confirm how a rule applies to your business with a qualified adviser.