Google has made no secret of it: Core Web Vitals are a core part of how pages are ranked. But for most UK businesses, the real cost of a slow website isn't the ranking penalty — it's the customers who leave before the page even finishes loading.
The three metrics that matter are LCP (how fast the main content appears), INP (how quickly the page responds to interaction) and CLS (how much the layout shifts while loading). A site that scores poorly on any of these frustrates users, damages trust and kills conversions.
So what actually slows a website down? Unoptimised images are the most common culprit, followed by render-blocking scripts, heavy third-party plugins and bloated themes. The good news is that each of these is fixable with the right approach.
At ZIIX we treat performance as a design constraint, not an afterthought. We set performance budgets before we write a line of code, we serve images in modern formats with lazy loading, and we architect our builds to ship minimal JavaScript.
The result is websites that load in under a second, feel instant to use and rank better for the searches that matter. If you'd like to know where your own site stands, ask us for a free performance audit.
Ready to put this into practice?
Talk to the ZIIX team about turning these insights into results for your business.