Why Does Speed Matter?
For two reasons: your visitors are impatient, and so is Google. Specific data:
- Every +1 second of loading reduces conversion by 7-10%
- 53% of visitors abandon a page that loads in 3+ seconds on mobile
- Google uses Core Web Vitals as a ranking factor
The 3 Metrics You Need to Watch
1. LCP (Largest Contentful Paint)
When the largest content element on the page becomes visible. Good below: 2.5 sec.
2. INP (Interaction to Next Paint)
How long it takes for the page to respond to a click. Good below: 200 ms.
3. CLS (Cumulative Layout Shift)
How much content shifts around during loading. Good below: 0.1.
Measure your own site on PageSpeed Insights.
The 7 Biggest Speed Killers
1. Unoptimized Images
On most pages, this accounts for 60%+ of data traffic. Solution: WebP/AVIF format, lazy loading, appropriate size.
2. Too Many Plugins (WordPress)
Every plugin loads CSS/JS. Typical rule: if you have 30+ active plugins, you're in trouble.
3. No Caching
A dynamic page is regenerated for every visitor. Cache plugins (WP Rocket, LiteSpeed Cache) offer a 30-70% speed increase.
4. Poor Hosting
By 2026, shared hosting will only be suitable for startups. You need VPS or managed WordPress hosting.
5. Render-blocking JavaScript
JS loaded in the header prevents rendering. Move it before </body> or use defer.
6. Web Fonts
External fonts (Google Fonts) slow things down. Download, host on your own server, use font-display: swap.
7. Third-party Scripts
Facebook Pixel, Google Tag Manager, chat widgets, these can easily add 1-2 seconds. Only load what you truly need.
Concrete Action List (by priority)
- Start a PageSpeed Insights measurement → save your baseline score
- Optimize images (TinyPNG, WebP converter)
- Install a cache plugin if you don't have one
- Delete unnecessary plugins
- Measure again → you should see a 20-40% improvement
- After this, more serious developer interventions can follow
What to Expect from Your Agency?
If you order a new website, ask for a guarantee: 90+ PageSpeed mobile score upon handover. By 2026, this is a basic expectation, not an extra service.