Commerce · 8 min read
What we check before touching a Shopify theme
A redesign fixes how a store looks, rarely why it underperforms. The audit order we run first — speed, tracking, funnel and unit economics — and why each comes before the next.
A redesign changes how a store looks. It rarely changes why it underperforms. Before we touch a theme, we run the same four checks, in the same order, because each one changes how you read the next.
Is the store slow because of the theme, or what’s on it?
Run Lighthouse on the home page, a collection page and a product page, on mobile. Then run the same pages with third-party scripts blocked. The gap between the two runs is the cost of your apps and tags — and it is often larger than anything the theme itself does.
Lab scores are only half the picture. Field data from real visitors, in Shopify’s web performance report and the Chrome UX Report, shows what customers actually experience on their own devices and networks.
Can you trust the numbers?
Compare orders in Shopify with purchases recorded in GA4 and in each ad platform for the same week. Large gaps point to missing events, duplicate pixels or consent settings that silently drop data. Until these line up closely, no change in conversion rate can be attributed to anything — including a redesign.
| Check | Where | What good looks like |
|---|---|---|
| Order reconciliation | Shopify vs GA4 | Purchase counts close for the same week |
| Duplicate pixels | Tag assistant | Each platform fires once per event |
| Funnel events | GA4 DebugView | view_item → add_to_cart → begin_checkout → purchase |
| Consent mode | Cookie banner | Events modelled, not silently dropped |
Where do sessions actually drop?
Build the funnel from product view to add-to-cart, checkout and purchase, split by device and traffic source. A drop concentrated on mobile product pages is a design brief. A drop at the shipping step is a pricing conversation, and no theme will fix it.
Does the business work at this conversion rate?
Cohort revenue per customer at 90 and 180 days, set against blended acquisition cost, tells you whether to optimise for the first order or for repeat purchases. The two lead to different redesigns: one simplifies the path to a first purchase, the other invests in accounts, subscriptions and post-purchase flows.
What the audit produces
A ranked list of fixes with the expected effect of each, and a clear answer to the question you started with: does this store need a new theme, or does it need the four things above fixed first?
Key takeaways
- Measure app and script weight before blaming the theme.
- Reconcile orders across Shopify, GA4 and ad platforms before testing anything.
- Let the funnel decide which templates get redesigned.
- Know your LTV-to-CAC position so the redesign targets the right metric.
FAQ
How long does a Shopify audit take?
About a week for most stores: two to three days of data collection and testing, then a written report with fixes ranked by expected impact.
Do I need a new theme to improve conversion?
Not always. Many stores gain more from removing heavy apps, fixing tracking and simplifying checkout steps than from a redesign.
Which tools are used in a Shopify audit?
Lighthouse and field Core Web Vitals data, GA4, the store's own Shopify analytics, and an automated crawl to find broken pages and markup errors.