Common ecommerce web design mistakes that hurt sales  | Lillian Purge

Common ecommerce web design mistakes that hurt sales

I have worked on ecommerce websites at every stage, from brand new stores launching their first product to established shops doing seven figures and trying to squeeze more performance out of their traffic. One thing I have learned very quickly is that most ecommerce sales problems are not traffic problems. In my opinion they are design and usability problems. You can drive all the visitors in the world to a site but if the design creates friction people will hesitate, doubt and leave.

What makes ecommerce web design tricky is that it has to do several jobs at once. It needs to look trustworthy, work flawlessly on mobile, guide users intuitively and remove any anxiety around payment, delivery and returns. When design gets in the way of any of those things sales suffer quietly and consistently. In this article I want to walk through the most common ecommerce web design mistakes I see and explain why they hurt sales and what small and growing ecommerce businesses should think about instead.

Prioritising looks over usability

One of the most common mistakes I see is ecommerce sites that are designed to look impressive rather than to sell. Clean visuals and strong branding matter but they should never come at the expense of clarity.

From experience overly artistic layouts often hide important information. Product prices are small. Add to basket buttons blend into the background. Navigation is clever but confusing. Users should never have to think about how to buy.

In my opinion the best ecommerce designs feel obvious. You instantly know what the product is, how much it costs and what to do next. If a design needs explaining it is probably hurting conversions.

Making it hard to understand the product quickly

Online shoppers do not have the patience they think they do. They scan rather than read and they make judgments very quickly.

A huge mistake is failing to communicate the core product value above the fold. If users land on a product page and cannot immediately understand what they are buying they will hesitate.

From experience product pages should clearly show the product name price main benefit and purchase action without scrolling. Supporting detail can sit lower down but the basics must be instant.

Confusion kills impulse buying.

Poor mobile experience

Most ecommerce traffic is mobile and yet mobile design is still treated as an afterthought on many sites. This is one of the most damaging mistakes because it affects such a large percentage of users.

I regularly see buttons that are too small, text that is hard to read and layouts that feel cramped on phones. Checkout forms are especially problematic on mobile.

In my opinion mobile design should be the starting point not the adaptation. If a site works perfectly on a phone it will almost always work well on desktop.

When mobile is frustrating users simply leave and rarely come back.

Overcomplicated navigation

Navigation exists to help users find what they want quickly. When it becomes overcomplicated it does the opposite.

From experience ecommerce sites with too many menu items confuse users and dilute focus. Categories overlap, labels are vague and important products are buried.

I think good navigation is ruthless. Only include what matters. Use clear language rather than internal brand terms. Make it obvious where products live.

If users cannot find what they are looking for within seconds they will look elsewhere.

Too many distractions on product pages

Product pages should be focused on one thing which is getting the user to add the item to their basket. Anything that distracts from that goal can hurt sales.

Common distractions include excessive pop ups unrelated banners and links that pull users away mid decision.

From experience every extra option increases cognitive load. This makes users more likely to abandon rather than decide.

In my opinion product pages should be calm and focused. Supporting information should reassure rather than distract.

Weak or unclear calls to action

Calls to action are not just buttons. They are signals that guide users towards the next step.

A common mistake is using vague or passive wording like submit or continue. These do not reinforce value.

From experience strong calls to action are specific and confidence building. Add to basket buy now or proceed to checkout make the intent clear.

Design also matters. Buttons should stand out visually and be placed where users expect them.

If the next step is not obvious users hesitate.

Hiding important trust signals

Ecommerce is built on trust. Users are handing over money and personal details. If they feel uncertain they will leave.

One of the biggest design mistakes I see is hiding trust signals too far down the page or not including them at all. Things like delivery information returns policies contact details and reviews should be easy to find.

From experience displaying reassurance near the purchase decision increases conversions significantly.

Trust should be visible not implied.

Poor product imagery

Images sell products. Weak imagery damages confidence.

Common issues include low quality photos lack of multiple angles or images that do not show scale or detail.

In my opinion product images should answer unspoken questions. What does it look like up close. How big is it. How is it used.

From experience better images often improve sales more than any copy tweak.

If users cannot clearly see the product they imagine the worst.

Overwhelming users with information

While missing information is a problem so is too much information at once.

Some product pages overwhelm users with long blocks of text specifications and technical detail without structure.

In my opinion information should be layered. Key benefits first then supporting detail for those who want it.

From experience collapsing secondary information behind tabs or accordions improves readability and decision making.

People want answers not essays.

Confusing pricing and hidden costs

Nothing damages trust faster than unexpected costs.

A common design mistake is hiding delivery fees taxes or additional charges until late in the checkout process.

From experience this leads to high cart abandonment and frustrated users.

In my opinion pricing should be as transparent as possible. If delivery costs apply say so early.

Surprises are rarely good for conversions.

Complicated checkout processes

Checkout is where sales are won or lost. Overcomplicated checkouts are one of the biggest conversion killers in ecommerce.

Common issues include forcing account creation too many form fields unclear progress indicators and poor error handling.

From experience the fewer steps the better. Guest checkout should be the default. Progress should be obvious.

Checkout design should feel calm and reassuring rather than demanding.

Poor error handling and feedback

When something goes wrong users need clear feedback. Unfortunately many ecommerce sites fail here.

Error messages are vague or appear far from the problem. Users do not know what needs fixing.

From experience clear inline feedback reduces frustration and abandonment.

Design should guide users through mistakes not punish them for them.

Ignoring site speed in design decisions

Design choices affect speed. Large images excessive scripts and heavy animations slow sites down.

Slow sites feel untrustworthy and frustrating especially on mobile connections.

In my opinion speed should be a design requirement not a technical afterthought.

From experience improving load times often has a direct positive impact on sales.

Inconsistent design across pages

Consistency builds confidence. Inconsistent layouts fonts or button styles create uncertainty.

I often see ecommerce sites where category pages feel different to product pages and checkout feels like a separate system.

From experience consistency reassures users that they are still in the same place and moving forward safely.

Design systems matter even for small sites.

Poor search functionality

Many ecommerce users rely on internal search. When it is poorly designed sales are lost.

Common issues include irrelevant results no suggestions and no tolerance for spelling mistakes.

From experience improving internal search can dramatically increase conversions especially on large catalogues.

Search should help users not test them.

Not designing for repeat customers

Many ecommerce sites focus entirely on first time users and forget returning customers.

Design mistakes here include hiding account areas making reordering difficult or not surfacing past purchases.

From experience making it easy for customers to buy again increases lifetime value significantly.

Good design thinks beyond the first sale.

Treating SEO and design as separate things

Design and SEO are deeply connected. Poor structure confusing navigation and hidden content hurt both rankings and conversions.

In my opinion ecommerce design should support visibility as well as usability. Clear categories logical URLs and internal linking benefit users and search engines.

From experience sites that integrate SEO thinking into design perform better long term.

Failing to test and iterate

One of the biggest mistakes of all is assuming the design is finished.

Ecommerce design should evolve based on user behaviour data. Heatmaps recordings and analytics reveal where users struggle.

From experience small iterative improvements often outperform full redesigns.

Design is a process not a one off project.

My honest advice for ecommerce businesses

If sales are lower than expected look at design before spending more on traffic. Ask whether the site makes buying feel easy or stressful.

In my opinion the best ecommerce designs are invisible. They do not draw attention to themselves. They simply guide users smoothly from interest to purchase.

Fixing design friction often delivers faster returns than chasing more visitors.

Final thoughts on ecommerce web design mistakes

Most ecommerce web design mistakes are not dramatic. They are small moments of friction that add up to lost sales.

From experience businesses that obsess over clarity usability and trust outperform those that obsess over aesthetics alone.

If you want to improve ecommerce sales start by making it easier for customers to say yes.