Ecommerce conversion optimization: What other guides aren't telling you

So you have the traffic, but not the sales. You have online shoppers adding to cart, but not getting orders passed through… What gives?
If you’re on this blog right now, you probably know the answer lies somewhere in ecommerce optimization. And if you think the first place to start is to take a look at what is stopping you from increasing your conversion rate at checkout, you’d be right.
Currently, you have 100s of pieces of content to choose from when it comes to getting your list of conversion depreciators and conversion rate optimization (CRO) techniques together. But there is a bigger part of the puzzle that is missing, one that most blogs don’t talk about…

So without further ado, let's take a moment to cover the commonly known contributors to lower conversion rates, then really dive into the conversion detractors that are just as important, but significantly less talked about, in the ecommerce industry.
Things We Know Are Killing Your Conversions
It’s no secret that there are a number of aspects that go into the buying decision process, and as ecommerce providers we only have control over a select few. It is for this reason that we now have a whole profession dedicated to ensuring that each of the aspects brands do have control over are perfectly ironed out and optimized to cut through the noise and doubt.
So imagine you’re taking a look at your metrics and are noticing a major leak in your sales funnel (or maybe you don’t have to imagine). You take a step back. The next logical step is to do some conversion optimization, right? You jump onto your search engine and type in something along the lines of, “How do I improve my checkout conversions in my ecommerce store?” or, “Best practices for conversion rate optimization.”
In all likelihood, you’ll be served up tons of guides with 10s and 100s of CRO tactics and page design tips that contribute to lower conversion rates.
When tackling online sales conversion, the framework that has been most successful for industry professionals has been to focus their CRO efforts into 3 main goals:
1. Getting leads i.e. Persuading prospects to give you their email addresses
2. Getting "Add to cart"s i.e. Driving visitors to place an item in their cart
3. Getting Orders i.e. Having potential customer successfully complete checkout
5 Known Tactics to Drive Conversion Across All 3 Goals
These are often related to human psychology and common sense, then confirmed through A/B testing:
1. FOMO (Fear of Missing Out): Countdowns, number of people looking at the same item, limited time offers, all these trigger deep emotions that make consumers want to sign up to take advantage of exclusive deals
2. Hierarchy of messages: Online shoppers like to know what to read first and where to click. Call to Action overload is often a silent conversion killer
3. Colour combination: Many A/B test show that changing the colour of the main CTA button drives substantially more clicks
4. Trust signals: Product reviews, testimonials, store rating, security icons, social proof, and photos of real people all contribute to improving trust in your online store
5. Live chat: Having a chat bot, phone number, or live human help can aid in getting more people further down the funnel
6. Layout and Mobile optimization: If your buttons are too small for large fingers, there’s a whole demographic you’re losing
Top 5 Known “Add to Cart” Conversion Killers
1. Low quality product photos
2. Weak product descriptions
3. Lengthy delivery time
4. Muddied eye-path / Clunky landing page design
5. Pricing
Top 4 Known Checkout Conversion Killers
1. Mandatory registration at checkout: Around 25% of shoppers abandon checkout because they are forced to create a membership account during the checkout process (source: Baymard Institute)
2. Unexpected costs: This is the top reason for cart abandonment and it’s driven by either a checkout layout that doesn’t show all the costs upfront, or shipping costs that are too high
3. Too long and complicated checkout form to fill: It’s proven, the less fields the better. Forms with unnecessary fields to be completed, extra steps or pages, or added distraction present more opportunities for drop offs
4. Not offering enough shipping and payment: Limited shipping and payment options can cause potential customers to shop elsewhere. As an example, fashion customers are now expecting free shipping and free return, many European markets prefer to pay with bank transfer, and millennials love their Buy Now Pay Later apps
Known Checkout Conversion Quick Fixes
Most ecommerce platforms, whether they are SaaS closed source like Shopify, or open source like Adobe Magento, don’t allow users to fully customize their checkout pages. Mainly enterprise merchants with their in house ecommerce platform or a big dev team who perform heavy customization can play around with the various CRO tactics mentioned above.
Adobe Commerce (formerly known as Magento 2) customers, though, no longer have to be stuck with a hard to customize default checkout template.
Built on the idea that ecommerce folks should have creative and strategic control over their checkout flow, OneStepCheckout works with Magento 2 stores and allows users to break out of Magento’s multi-page, templated flow and create their own optimized checkout page.
Based on 10 years of feedback from tens of thousand of merchants, the plugin offers possibilities to choose:
- Registration modes that cause less friction
- Form filling layouts that work best for merchants’ respective customers
- Popular shipping options and payment options for each market
- User experience that is proven to drive better completion rate (hiding coupon codes, showing total upfront, etc.)
Here is what a highly converting checkout page looks like, with an average improvement of 30 to 35% just driven by design changes.

Personally, I highly recommend checking out their free and self service demo. They’ve been a great resource for many of my contacts. (You can see a few of their use cases here: Magento 2 Examples: 13 US-based online stores).
If your store is not built on Magento, you can still take inspiration from the features they chose to include in their product overtime as those are the one in highest demand from their clients.