Website Performance Guide
Core Web Vitals & Speed Optimization
Slow websites lose customers. Studies show 53% of mobile users abandon sites that take over 3 seconds to load. This guide explains what makes websites slow and exactly how to fix it. No technical background required.
Quick Summary
- ✓Core Web Vitals are Google's official metrics for user experience, and they affect search rankings
- ✓LCP under 2.5 seconds is the target for "good" loading speed
- ✓Images are the #1 culprit. Unoptimized images cause 80% of slow page loads
- ✓Every 1-second delay costs you approximately 7% in conversions
What Are Core Web Vitals?
Core Web Vitals are three specific metrics Google uses to measure how users experience your website. Since 2021, they're a direct ranking factor, meaning slow sites rank lower in search results.
LCP(Largest Contentful Paint)
How quickly the main content loads
Why it matters: Users perceive the page as "loaded" when LCP fires. Slow LCP = users leave before seeing your content.
INP(Interaction to Next Paint)
How responsive the page feels when clicked
Why it matters: Slow INP makes buttons and links feel "laggy" or broken. Users may click multiple times or give up.
CLS(Cumulative Layout Shift)
How much the page jumps around while loading
Why it matters: Layout shifts cause users to click the wrong thing or lose their place. Extremely frustrating on mobile.
Common Performance Issues (and How to Fix Them)
These are the issues we find most often when auditing websites. Each one directly impacts your Core Web Vitals and, consequently, your search rankings.
Unoptimized Images
CriticalImages not compressed or sized correctly are the #1 cause of slow websites. A single 5MB hero image can add 10+ seconds to load time.
Convert images to WebP format, resize to actual display size, and use lazy loading for below-fold images.
Render-Blocking JavaScript
HighJavaScript that loads before the page can display forces users to wait. Common with analytics, chat widgets, and ad scripts.
Add "defer" or "async" attributes to script tags, or move scripts to the bottom of the page.
No Browser Caching
HighWithout caching, browsers re-download everything on every visit. Returning visitors experience the same slow load as first-timers.
Set Cache-Control headers to cache static assets (images, CSS, JS) for at least 7 days.
Too Many Third-Party Scripts
HighEach third-party script (analytics, chat, ads, social) makes additional network requests and runs JavaScript that slows everything down.
Audit all third-party scripts. Remove unused ones. Load non-critical scripts after page load.
Uncompressed Text Resources
MediumHTML, CSS, and JavaScript files sent without compression are 3-5x larger than they need to be.
Enable GZIP or Brotli compression on your server. Most hosting providers support this.
Slow Server Response
MediumTime To First Byte (TTFB) over 600ms indicates server-side issues: slow database queries, shared hosting overload, or missing caching.
Upgrade hosting, enable server-side caching, optimize database queries, or use a CDN.
How to Test Your Website's Performance
You don't need technical expertise to check your site's speed. Here are the tools we recommend:
Google PageSpeed Insights
Free tool from Google that shows your Core Web Vitals and Lighthouse score. Tests both mobile and desktop.
pagespeed.web.dev →GTmetrix
Detailed waterfall charts showing exactly what's loading and when. Great for identifying specific bottlenecks.
gtmetrix.com →OpsBlu Full Audit
Our full audit runs Lighthouse on every page plus SEO, security, WCAG accessibility, and more. Results prioritized by business impact.
Get Full Audit →Chrome DevTools
Built into Chrome browser (F12 → Lighthouse tab). Best for developers who want to test changes in real-time.
Press F12 in Chromepages.learn.performanceGuide.faqTitle
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847 checkpoints across every page: Google Lighthouse performance (desktop + mobile), WCAG accessibility compliance, security headers, SEO structure, analytics setup, and competitive benchmarking. Every issue ranked by business impact with specific fix instructions.
You choose: fix it yourself using our report, hand it to your developer, or let us handle everything. Most clients choose the last option - one team handles your site, ads, analytics, and security. One invoice. No surprises.
Site maintenance, Google Ads management, analytics setup, SEO optimization, security monitoring, performance optimization. Monthly reporting. One team. One invoice. Retainer tiers from $500/mo to $3,000/mo depending on hours needed.
The free quick scan runs in 60 seconds. The full audit is expert-reviewed and delivered within 2 business days. Every report includes a 15-minute call to walk through findings.
No. The audit is one-time ($500). Retainers are month-to-month - cancel anytime. We also offer 15% off for annual prepay if you want to lock in savings.
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