SEO & Insights2 min read
Browser Caching Explained: Cache-Control, ETag and Expires
Learn how browser caching works and how Cache-Control, ETag, and expiration policies can reduce repeated downloads and improve website performance.
Our Blog & Insights
The Site Vitals Blog
Explore expert articles, step-by-step guides, and developer-centric tutorials on Core Web Vitals, page speed optimization, security headers, accessibility standard compliance, and technical SEO diagnostics.
SEO & Insights1 min read
301 vs 302 Redirects: Which Redirect Should You Use?
Understand the difference between 301 and 302 HTTP redirects, common SEO use cases, redirect chains, redirect loops, and migration mistakes.
Security1 min read
Website Performance Monitoring vs One-Time Audits
Compare one-time performance audits with continuous monitoring and learn when each approach is useful for maintaining website speed.
Accessibility2 min read
WCAG 2.1 AA Website Accessibility Checklist
A practical accessibility checklist covering headings, keyboard navigation, forms, images, color contrast, focus states, and accessible interactive components.
SEO & Insights2 min read
JavaScript SEO: How Search Engines Handle JavaScript Websites
Learn the fundamentals of JavaScript SEO, including crawling, rendering, indexability, links, client-side rendering, and common technical issues.
Core Web Vitals1 min read
How to Monitor Core Web Vitals Over Time
Learn why Core Web Vitals should be monitored continuously and how to detect performance regressions after deployments, redesigns, and content changes.
SEO & Insights1 min read
How Third-Party Scripts Affect Website Performance
Learn how analytics, advertising, chat widgets, A/B testing, social widgets, and other third-party scripts can affect page speed and responsiveness.
SEO & Insights2 min read
Website Waterfall Analysis: How to Find Performance Bottlenecks
Learn how to read a browser network waterfall and identify slow server responses, render-blocking resources, large assets, third-party requests, and request chains.
Performance2 min read
How to Optimize Images for Website Performance
Learn how image format, dimensions, compression, responsive images, lazy loading, and prioritization affect website performance and Core Web Vitals.