What is conversion rate optimisation?
Conversion rate optimisation is increasing the percentage of your online store’s visitors who place an order, known as the conversion rate. You do it by helping visitors find what they’re looking for faster, removing their doubts and making checkout easier. You measure every improvement with a control group.
A higher conversion rate makes every euro you already spend on ads and SEO worth more. Growth Sharks helps online stores choose between personalisation, an AI sales assistant, a shopping app or a branded discount code page.
Last updated on 10 November 2026 by Raymond Vonk, co-founder of Growth Sharks.
Four technologies that turn visitors into buyers
Each one tackles a different moment in the customer journey. You don’t have to do everything at once.
If you know where visitors drop off before Christmas (25 December), you’ll get more out of the busiest weeks of the year.
Which approach fits your online store?
From the Knowledge base: more conversions
Go to the Knowledge base →Frequently asked questions about conversion
What is conversion rate optimisation?
Conversion rate optimisation is increasing the percentage of online store visitors who place an order. You do it by helping visitors find what they’re looking for faster, answering their questions and simplifying checkout. Ideally you measure every change with a control group, so you know what really works.
How do you calculate an online store’s conversion rate?
Divide the number of orders by the number of visits in the same period, and multiply by 100. With 40,000 visits and 1,600 orders, your conversion rate is 4%. Look at the figure per device and per channel too, because mobile converts differently from desktop in most stores.
What is a good conversion rate?
It varies widely by sector, price level and channel. A store selling consumables sees different figures from a furniture store. So compare mainly with your own figures from last year, and measure the effect of every change with a control group rather than chasing a general average.
Why is my mobile conversion rate lower than on desktop?
On a small screen, searching, comparing and checking out is harder, and on a mobile site customers often have to log in and enter their details again. A shopping app solves part of that: customers stay logged in and check out faster. According to Reskyt, app users convert 5 times better than mobile web visitors.
Does personalisation really improve conversion?
Yes, if it goes beyond a fixed recommendation block. Real personalisation adapts search results, recommendations and bundles to each visitor’s behaviour. According to Segmentify, 75% of customers prefer brands that make personal recommendations. Always measure the effect with a control group.
Does an AI sales assistant increase conversion?
An AI sales assistant such as Cervito helps visitors who hesitate: it asks follow-up questions, compares products from your live catalogue and puts the choice straight into the cart. Whether that brings in more orders for your store, Cervito measures with a control group that doesn’t see the assistant.
How do I measure whether an improvement really increases conversion?
With a control group. Part of your visitors doesn’t see the change, the rest do. The difference in order rate between the two groups is the real effect, regardless of season, campaigns or chance. Segmentify and Cervito have such a control group built in.
Which technology fits my online store?
That depends on where visitors drop off today: when searching, when hesitating, on mobile or at checkout. Each moment calls for a different solution. In a 30-minute call we look at your numbers together and give you our advice.
What does a conversion consultation cost?
Nothing. Our advice is free for online stores, even if you then choose one of the technologies. Growth Sharks has agreements with the technology companies themselves; you only pay for the technology, directly to the vendor.
Where do your visitors drop off?
In 30 minutes we look together at your conversion rate per channel and device. You get advice on which approach delivers the most.