How to improve the website performance

Website performance directly impacts user experience, conversion rates, and search rankings—it's one of the few factors that simultaneously serves your client's visitors and their SEO. The most impactful improvements usually come from addressing Core Web Vitals, which Google has confirmed as ranking factors. Start by running your client's site through PageSpeed Insights and Chrome DevTools to identify specific bottlenecks. Largest Contentful Paint (LCP) typically needs the most work; you'll improve it by optimizing images, deferring non-critical JavaScript, and reducing server response time. First Input Delay (FID) and Cumulative Layout Shift (CLS) matter less for rankings now that Interaction to Next Paint (INP) has replaced FID, but they still affect real users. You can reduce INP by breaking up long JavaScript tasks, lazy-loading below-the-fold content, and minimizing render-blocking resources.

Image optimization alone often delivers visible performance gains without major development work. Most sites serve images at unnecessarily high resolutions or file sizes. Implement responsive image formats like WebP with fallbacks, serve appropriately sized images for different devices, and compress aggressively. A CMS plugin can automate much of this. Server response time becomes relevant once you've tackled code and images—if TTFB (Time to First Byte) is slow, you're dealing with hosting or backend issues rather than front-end problems.

Caching strategy matters more than people realize. Browser caching through proper headers keeps repeat visitors fast. For server-side caching, static site generation, edge caching, or a CDN can dramatically reduce origin server load. If your client uses WordPress, caching plugins handle much of this automatically, but you need to verify they're configured correctly—default settings often leave performance on the table.

Finally, prioritize improvements based on actual user data. Core Web Vitals measured in the field (real user monitoring) matter more than lab data from tools. Check Search Console's Core Web Vitals report to see what's actually impacting your client's site. A 2-second improvement to LCP might matter more than perfect CLS if your client's visitors are already experiencing slow page loads. The goal isn't a perfect PageSpeed score—it's ensuring visitors can interact with the page quickly and the page doesn't shift under them while they're trying to engage.