Hosting terms
What are Core Web Vitals? A plain guide for business owners
Key takeaway
Core Web Vitals describe three parts of a visitor’s experience: loading, response to an interaction and visual stability. Their names are LCP, INP and CLS. Hosting can influence part of that experience, but pictures, code and layout also matter. A good score does not guarantee a Google ranking.
In this guide
Three ways to describe the experience
Core Web Vitals are Google’s measures of loading, interaction response and visual stability. They help turn “this page feels slow” into a more useful discussion. You can ask someone to explain the experience behind a number rather than hand you a score.
Think about a customer trying to book a service on a phone. They need the useful content to appear, the booking button to respond and the page to stay in place when they try to tap it.
LCP: when the main content appears
Largest Contentful Paint, or LCP, concerns the largest visible picture or text block arriving on the screen. Google’s good target is 2.5 seconds or less. It is about the main visible content, rather than the last background request finishing.
For your business, an opening service description or main picture is a useful example. Ask what kept that content waiting and which change would reduce the delay.
Help your main pictures load efficiently
Sources: Google: Largest Contentful Paint (opens in a new tab)
INP: how promptly the page responds
Interaction to Next Paint, or INP, describes how quickly the page visibly responds to an interaction. Google’s good target is 200 milliseconds or less. A button that pauses after a tap can be frustrating even if the page initially appeared quickly.
When discussing a report, describe which interaction matters to the business. A booking control and a decorative animation do not deserve equal attention simply because both appear on the same page.
Find whether the website or hosting causes the delay
Sources: Google: Interaction to Next Paint (opens in a new tab)
CLS: whether the layout stays put
Cumulative Layout Shift, or CLS, measures unexpected movement in the page layout. Google’s good target is 0.1 or less. Reserving room for content such as pictures can help avoid a button moving as a visitor reaches for it.
Stable pages are especially valuable where the next action matters. Check the contact details, navigation and enquiry button while the page loads, as well as how the finished design looks.
Choose practical speed improvements
Sources: Google: Cumulative Layout Shift (opens in a new tab)
Read the measures in context
The recommended targets are assessed at the 75th percentile of visits for each measure. In ordinary terms, the assessment looks beyond one unusually good test. Check whether your report uses actual visitor experience or a simulated run, and whether it describes the page or wider website.
Good Core Web Vitals support a better experience. They do not replace helpful content or guarantee a position in search results. Use them to choose sensible improvements, then confirm that customers can still complete the task.
How hosting supports your SEO work
Sources: Google: the three Core Web Vitals and their targets (opens in a new tab)Google: page experience and search results (opens in a new tab)
Where hosting fits
Lightning Web Hosting uses AWS hosting and includes CloudFront CDN in both plans. Those are useful parts of the delivery setup. The website’s images, scripts and layout still need suitable choices, which is why we assess the actual site before confirming a move.
Thunder is NZ$55 + GST per website a month. Lightning is NZ$99 + GST and adds everyday Arc updates. Modernisation is available when the existing website needs a more substantial rethink, with the scope agreed and human oversight included.