CRO Diary · a conversion specialist's working notebook entries reviewed weekly
CRO Diary

More sales from the traffic you already have

A smartphone and an open laptop side by side on a wooden desk showing the same online store, printed bar charts underneath
Benchmarks

Conversion Rate by Device: The Published Mobile vs Desktop Gap

Mobile carries three quarters of ecommerce traffic and, depending on whose panel you read, converts either 37% worse than desktop or slightly better. Both findings are real. I lay out the published numbers, then add a live CrUX pull that explains part of the contradiction.

Aug 7, 2026 · latest entry

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An open worn notebook with a long handwritten checklist beside a laptop showing an online clothing store in warm morning light

How to Increase Conversion Rate on Shopify: The Full Playbook

Every lever in this playbook comes with a published receipt: Baymard's abandonment numbers, the Renault and Vodafone speed studies, the 300 million dollar guest checkout story. No folklore, no 'we tested it on a client', just the evidence and the order I would pull the levers in.

Experiments
A quarterly paper planner open across three monthly pages with handwritten tasks and yellow sticky notes under warm lamp light

The 90-Day CRO Roadmap for a Store With No Budget

No testing tool, no agency, no budget line. Just free instruments, published research and one quarter of disciplined work. This is the exact sequence I would run on any store that has traffic and nothing else.

Notes
A hand sketching a funnel diagram in a paper notebook with a laptop showing an analytics dashboard blurred in the background

Reading Your Funnel in GA4 Without Losing Your Mind

GA4 already tracks a nine event path from product list to purchase. The sanity trick is ignoring most of it: one funnel exploration, five steps, closed mode, compared by device. Here is my exact setup.

Notes
2,800 The two serious panels disagree on the device gap: Littledata's 2,800 mostly small and mid-size Shopify stores show mobile at 1.2% versus desktop at 1.9%, while Dynamic Yield's enterprise panel over the twelve months to June 2026 shows mobile at 2.86% actually edging out desktop at 2.46%.
39% The levers with the strongest published evidence are unglamorous: reveal full costs early (39% of US abandoners cite cost surprises), keep guest checkout default (the documented 300 million dollar button raised purchasing customers 45%), cut checkout fields toward Baymard's ideal 12 to 14, and get mobile LCP under Google's 2.5s line.
, A zero-budget CRO quarter is measurement first, leaks second, experiments last: days 1 to 14 build the baseline, days 15 to 45 remove the leaks that published research has already convicted, days 46 to 90 run one honest change at a time.

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