09/09/2026
The Most Expensive 3 Seconds in E-commerce
In e-commerce, website speed is often treated as a technical metric. But those seconds are directly tied to revenue.
A Deloitte study found that improving mobile load time by just 0.1 seconds was associated with an 8.4% increase in conversion. At the same time, mobile users still convert significantly worse than desktop users, while 75% of large e-commerce websites provide only an average level of mobile UX.
And the problem isn’t just page load time. Those same “3 seconds” can be lost while searching for a product, waiting for a price to appear, opening a filter, or waiting for a button to respond.
The customer doesn’t think, “This website is slow.” They simply decide that the next store will be easier to use.
That’s why Step Link looks at performance not just as a developer task, but as a CRO tool: identifying exactly where users wait, hesitate, or take unnecessary actions and how much those moments are costing the business.