Before you spend more on ads, make sure your Shopify store converts the traffic it already gets. That means checking six areas: speed, product pages, cart, checkout, trust, and how shoppers find products through collections and search. Most stores find at least one serious leak in several of them. Fix the obvious problems directly, test the uncertain ones with a Shopify CRO app, and only then scale traffic. Every improvement you make here multiplies the return on every ad dollar that follows.
Here’s the checklist I’d run through on any Shopify store, with what to look for and how to decide whether to fix or test.
Fix or test? A quick rule
Not everything needs an A/B test. If something is clearly broken, fix it. A missing size chart, a checkout error on one browser, a product image that won’t load on mobile. Testing a bug fix wastes traffic.
Test when reasonable people could disagree about the outcome. Moving reviews higher, changing the free shipping threshold, rewriting the product description opening. Those can go either way, and only data settles them.
1. Speed and stability
Speed is the foundation. A Deloitte study commissioned by Google, Milliseconds Make Millions, found that a 0.1 second improvement in mobile site speed was associated with an 8.4% increase in retail conversions.
Check:
- Run your homepage, top collection, and top product page through PageSpeed Insights on mobile. Google’s Core Web Vitals thresholds are your yardstick: Largest Contentful Paint at 2.5 seconds or under, Interaction to Next Paint no slower than 200 milliseconds, and Cumulative Layout Shift no higher than 0.1. When LCP is the one failing, I look at the hero image before anything else.
- Open your app list and note what each one loads on the storefront. There’s often a review widget you replaced last year still shipping its script. Uninstall what you don’t use, then check the theme files, because some apps leave code behind.
- Compress and properly size hero images. Oversized images are the most common speed problem on Shopify themes.
Fix, don’t test. Speed problems are almost always worth solving outright.
2. Product pages
Product pages are where most buying decisions happen, so they usually hold the biggest opportunities.
Check on mobile: Can a shopper see the price, the main benefit, a review summary, and the add-to-cart button without scrolling far? Is delivery timing clear? Are sizing, ingredients, compatibility, or other common questions answered on the page rather than buried in tabs?
Look at evidence: Watch 20 to 30 session recordings of mobile product page visits. Read the last month of support tickets and pre-sale chat. The questions shoppers ask are your to-do list.
Test candidates: review placement, description opening lines, image order, delivery date near the button, and answering the top question directly on the page.
3. Cart
The cart is where intent becomes commitment, and it’s often cluttered.
Check: Does the cart drawer show the total clearly? Are there so many upsells that the checkout button gets lost? Is a free shipping threshold explained, and is it reachable for a typical order?
Test candidates: a free shipping progress bar, one upsell versus several, showing estimated shipping in the cart, and the wording of the checkout button.
4. Checkout
Shopify’s checkout is already well built, but settings and add-ons can still create friction. Baymard Institute’s checkout research estimates that the average large ecommerce site can gain a 35.26% increase in conversion rate through better checkout design alone, and its benchmark found the average leading site has 39 potential areas for checkout improvement. Even if your gains are a fraction of that, it’s worth a careful look.
Check:
- Is guest checkout available? Baymard found 18% of abandoners left because a site wanted them to create an account.
- Are express payment options visible?
- Do shipping costs appear before the final step, or as a late surprise?
- Do discount code fields send shoppers off hunting for codes?
If you’re on Shopify Plus, you get more room inside the checkout itself, so the order of payment methods or a line of trust messaging becomes something you can test. On other plans, focus on everything before checkout and on your checkout settings.
5. Trust and reassurance
Shoppers who don’t trust you won’t buy, no matter how good the page looks.
Check: Is your returns policy easy to find from product pages? Do the reviews sound like actual customers, and is the newest one from this season rather than two years ago? Is contact information visible? Are shipping times honest?
Test candidates: a short trust strip near the add-to-cart button with returns and delivery information, featuring detailed reviews over star counts, and adding a “questions? chat with us” prompt on high-consideration products.
6. Collection pages and site search
Shoppers who can’t find the right product never reach the product page, so this step gets overlooked more than it should.
Check: On your top collections, what does the default sort show first? Are filters useful on mobile, or hidden behind a tiny icon? Do product cards show enough to choose from, like price, rating, and a variant hint? Then try your own search bar with misspellings and plain-language queries. “Red dress for wedding” should return something sensible, not an empty page.
Look at evidence: Pull your site search report from analytics. Searches with no results are free product and content ideas. Searches that return results but lead to exits suggest the results aren’t relevant.
Test candidates: default sort order, adding ratings or a short benefit line to product cards, and a more prominent filter button on mobile. Zero-result searches are usually a fix, not a test. Add synonyms or redirects so common queries land somewhere useful.
Turning the checklist into a plan
After the audit, you’ll have two lists: fixes and test ideas. Do the fixes first, in a week or two. Then rank the test ideas by how much traffic the page gets and how strong the evidence is behind each idea. Run one test per page template at a time, with a sample size calculated in advance.
Platform matters here too, because your store platform decides how much your ecommerce CRO tools can actually change. Shopify’s app ecosystem and native checkout make it one of the easier platforms to optimize without heavy development. If you’re weighing platforms, planning a migration, or choosing ecommerce optimization software to pair with them, this comparison of how ecommerce platforms compare for CRO looks at testing access, checkout flexibility, and developer dependency across the main options.
Repeat the audit every quarter. Stores change constantly. New apps get installed, seasonal banners pile up, and product pages drift. A quarterly pass catches regressions before they cost you a full season of sales, and it keeps your test backlog stocked with fresh, evidence-backed ideas.
What a good Shopify CRO app should cover
You can run this checklist by hand, but a dedicated Shopify CRO app speeds up the testing half. Of all the conversion rate optimization tools available, look for one that works on your theme without edits, lets a marketer build variants without code, tracks orders and revenue, supports template, theme, and offer tests, and doesn’t drag down your Core Web Vitals.
CustomFit.ai is one example built for this workflow. It’s a no-code A/B testing, personalization and CRO platform for D2C and Shopify brands, and its AI Wingman includes an audit agent that connects data from GA4, Microsoft Clarity, Search Console and ad accounts to suggest a 12-week testing roadmap, which is handy when you’re turning an audit like this into a plan.
Key takeaways
Before buying more traffic, audit your Shopify store in six areas: speed, product pages, cart, checkout, trust, and collections with site search. Fix what’s clearly broken right away. Test what’s uncertain, starting with high-traffic templates and evidence-backed ideas. Measure on revenue per visitor and run tests for full weeks. Once your store converts well, every dollar of new traffic works harder, which is the whole point of doing this first.
