Your products might be brilliant. Your pricing might be sharp. But if your online store is poorly designed, none of that matters. Visitors will leave, carts will be abandoned, and you will spend your marketing budget driving traffic to a site that does not convert.
We have built and audited dozens of e-commerce sites, and the same mistakes come up again and again. Here are the seven most common ones we see — and exactly how to fix each of them.
1. Slow Product Pages
If your product pages take more than three seconds to load, over half your visitors are already gone. We are not exaggerating. Google's own research shows that 53% of mobile users abandon a site that takes longer than three seconds. For an e-commerce store, every second of load time can cost you 7% in conversions.
The fix: Compress every product image before uploading. Use WebP format where possible. Implement lazy loading so images below the fold only load when the visitor scrolls to them. Strip out unnecessary apps and plugins that add weight to every page load. If your platform is inherently slow, it might be time for a conversation about alternatives.
2. Poor Mobile Checkout
More than 70% of e-commerce traffic now comes from mobile devices, yet most stores still treat mobile checkout as an afterthought. Tiny form fields, keyboards that cover the submit button, no autofill support — it is a recipe for abandoned carts.
The fix: Test your entire checkout flow on a real phone, not just a browser preview. Use large tap targets (at least 44px), enable autofill for address and payment fields, and support digital wallets like Apple Pay and Google Pay. Remove every unnecessary field. If you do not need their company name, do not ask for it.
3. No Social Proof Where It Matters
Reviews and testimonials are your most powerful sales tool, yet many stores bury them at the bottom of the page or hide them behind a tab. If a visitor has to hunt for social proof, they will not bother. They will just leave.
The fix: Display star ratings directly on product cards in your listing pages. Show the review count prominently near the price on product pages. Feature a few short testimonials above the fold. If you have user-generated photos, use them — they are more trusted than your professional product shots.
Every friction point in your checkout is a decision point. And every decision point is a chance for the customer to choose “not today.”
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Every additional step in your checkout process costs you customers. The best e-commerce experiences get a buyer from “I want this” to “It’s ordered” in as few clicks as possible. If your checkout has five pages with a registration wall before payment, you are bleeding sales.
The fix: Offer guest checkout. Always. Consolidate your checkout to as few steps as possible — ideally a single page with shipping, payment, and order review in one view. Use progress indicators so buyers know where they are. And never force account creation before purchase.
5. Bad Product Photography
Online shoppers cannot touch, hold, or try your product. Photography is the only thing standing between curiosity and confidence. Blurry images, inconsistent lighting, or a single angle per product tells the customer you do not take your own products seriously.
The fix: Invest in quality product photography with consistent lighting and backgrounds. Show every product from multiple angles. Include at least one lifestyle shot showing the product in context. Enable zoom functionality. If you sell clothing or accessories, show them on real people, not just a flat lay.
6. Hidden Shipping Costs
This is the number one cart abandonment killer, and it has been for years. The Baymard Institute found that 48% of shoppers abandon their cart because extra costs like shipping were too high — and crucially, they only discovered them at checkout. That is not a pricing problem. It is a transparency problem.
The fix: Be upfront about shipping costs from the start. Display them on product pages or at least in the cart before checkout. Offer free shipping thresholds and make them visible (“Free shipping on orders over £50” in your header). If free shipping is not viable, consider building a portion into your product prices so the sticker shock is eliminated.
7. No Trust Signals
You are asking strangers to hand over their card details. If your site does not look trustworthy, they simply will not do it. Missing SSL indicators, no visible return policy, no contact information, no security badges — these gaps erode confidence at the exact moment you need it most.
The fix: Display security badges and accepted payment methods near your checkout button. Make your return and refund policies easy to find — link to them from product pages and the cart. Show your physical address and phone number in the footer. Include a clear privacy policy. These are small additions that have an outsized impact on buyer confidence.
Key Takeaway
E-commerce success is not just about what you sell — it is about how easy and trustworthy you make the buying experience. Fix these seven mistakes and you are not optimising your store; you are removing the barriers between your customers and the checkout button. Start with the quick wins: show shipping costs early, display reviews prominently, and test your mobile checkout on an actual phone today.
