E-Commerce Website Optimisation: How to Double Your Conversion Rate

Conversion rate optimisation (CRO) is the highest-ROI activity for any established e-commerce business. Doubling your conversion rate from 1% to 2% doubles your revenue without spending a penny more on traffic.

Page Speed is Non-Negotiable

Every additional second of page load time reduces conversions by approximately 7%. On mobile, the impact is even more pronounced. A Google PageSpeed score below 70 is costing you sales every day.

The most common causes of slow e-commerce sites are unoptimised images, excessive third-party scripts, and poorly chosen hosting. All three are fixable.

Mobile Experience Determines Success

More than 65% of e-commerce browsing happens on mobile devices. Yet most stores are designed on desktop and adapted for mobile as an afterthought. The result is friction at every step of the purchase journey.

Mobile-first design — where the mobile experience is the primary design consideration — consistently outperforms desktop-first approaches on conversion metrics.

Product Pages That Convert

Your product page has one job: give the shopper enough confidence to add to cart. High-quality images from multiple angles, video where possible, clear sizing or variant information, visible stock levels, and prominent social proof all contribute to this confidence.

Delivery information — particularly the estimated delivery date — is one of the most underrated conversion drivers. Showing "Order today, receive by Thursday" outperforms vague "3–5 business days" messaging consistently.

Checkout Friction Kills Sales

The average e-commerce checkout abandonment rate is 70%. The most common causes are forced account creation, too many form fields, limited payment options, and unexpected costs at checkout.

Guest checkout, address autocomplete, and multiple payment options (including Buy Now Pay Later) address the majority of abandonment causes.

Social Proof and Trust Signals

Reviews, trust badges, security certifications, and clear returns policies all reduce purchase anxiety — particularly for first-time buyers. Displaying these prominently throughout the purchase journey, not just on product pages, lifts conversion rates.

Testing and Iteration

CRO is not a one-time project. It is a continuous programme of hypothesis, testing, and iteration. Even small incremental improvements compound significantly over time.