Site speed and Core Web Vitals: what they cost your Danish webshop in conversions
What LCP, INP and CLS mean, what a slow webshop can cost you, how to check your speed and what to fix first without rebuilding the whole site.
Vasile Dingă
Site speed is one of the most overlooked causes of weak conversion. Webshop owners look at ads, prices and design, but rarely at how long it takes for the product page to become usable on an ordinary phone on mobile data. Danes have some of the fastest mobile networks in Europe and very little patience for slow pages. Here's what Core Web Vitals mean, what a slow site can cost you and what you can fix without rebuilding your whole webshop. What Core Web Vitals are Core Web Vitals are three measurements Google uses to assess the real experience of visitors, based on Chrome data. What counts is the value for 75% of visits, not the average. .comparison-cards { display: flex; flex-direction: column; gap: 1.5rem; } .comparison-card { background: #fff; border-radius: 16px; padding: 20px; border: 2px solid #efefef; } .comparison-header { display: flex; justify-content: space-between; font-size: 16px; margin-bottom: 12px; } .comparison-row { display: flex; justify-content: space-between; padding: 8px 0; border-top: 1px solid #efefef; font-size: 14px; color: #1f2937; } .comparison-label { font-size: 14px; width: 100%; } .comparison-value { width: 100%; text-align: right; } @media (max-width: 600px) { .comparison-row { flex-direction: column; align-items: flex-start; } .comparison-value { text-align: left; margin-top: 4px; } } The 3 Core Web Vitals Good threshold LCP : how long until the main element appears, usually the product image under 2.5 seconds INP : how quickly the page reacts when you tap a button, such as "Add to cart" under 200 milliseconds CLS : how much elements "jump" while the page loads under 0.1 INP replaced FID in March 2024, and it is often the metric webshops fail, because of tracking, chat, review widgets and pop-up scripts. What a slow site costs you The "Milliseconds Make Millions" study, carried out by Deloitte for Google across 37 brands and more than 30 million sessions, found that a 0.1-second improvement in mobile speed was associated with an…