Real-user performance: CrUX and Core Web Vitals
Read CrUX scope, the rolling window and the 75th percentile; combine lab and real-user LCP, INP and CLS without misleading comparisons.
Read more
Blog & Learn
Category SEO & Marketing
Practical articles on hosting, servers, security, SEO and online business — in plain, useful language.
What Is TTFB and Why Does Your Website Seem Slow?
High TTFB means users are waiting, even if the server is fast. In this article, you'll learn how to separate network, server, and browser time and figure out where you actually need to optimize.
Read moreOptimizing Persian Fonts on Your Website; Fixing Text Shift and Reducing Size
A practical guide to eliminating text shift when loading Persian fonts. From font-display and subsetting to actually measuring FOIT and FOUT with free tools.
Read moreEliminating Render-Blocking Resources: A Practical Guide for Persian Websites
Render-blocking CSS and JavaScript eat away at your website's speed. In this article, you'll learn how to implement critical CSS, use defer and async correctly, and understand when preload is a solution and when it's a problem.
Read moreLazy Loading: A Practical Guide That Won't Ruin Your Site's LCP
Proper lazy loading can multiply your site's speed; but if you lazy-load the above-the-fold image, LCP gets devastated. Here we'll tell you exactly where to use it, where not to, and how to implement it correctly.
Read moreImage Optimization with WebP and AVIF; A Practical Guide to Reducing Size
A practical guide to image optimization with WebP and AVIF; real size comparison, browser support, precise conversion commands, and how to serve with the picture tag without breaking your older users' experience.
Read moreFixing CLS Layout Shift on Persian Websites; From Font to Image
Layout shift (CLS) ruins the SEO ranking and user experience of Persian websites. In this guide, we examine the three main sources of shift — font, ad, and image — with precise commands and code.
Read moreImproving LCP: Finding the Culprit Element and Fixing Slow Loading
A step-by-step guide to finding the LCP element in DevTools, four common causes of its slowness, and the correct order of fixes to improve LCP and user experience.
Read moreCore Web Vitals: A Practical Guide to LCP, INP, and CLS
Learn Google's Core Web Vitals metrics with precise thresholds, measurement commands, and common mistakes in optimizing LCP, INP, and CLS.
Read more