Guides
In-depth guides
Longer walkthroughs for specific setups: real screenshots, code you can paste and the reason behind every step. The short fix page for each check lives under Learn.
All guides
34 guides, page 1 of 3.
- Speed12 min read
CDN basics: what a CDN fixes and what it does not
A CDN puts copies of your files near your visitors and takes TLS, HTTP/2 and compression off your server. What that changes, what it cannot, and how to set one up without caching the wrong pages.Updated 25 Sept 2026 - Speed13 min read
Core Web Vitals for e-commerce: product and category pages
Where shops fail LCP, CLS and INP on product pages, category grids and checkout, with the fix for each template, the WooCommerce and Shopify settings behind them, and how to measure per template.Updated 25 Sept 2026 - Speed14 min read
Core Web Vitals for news and publisher sites: ads, embeds and CLS
Publishers fail Core Web Vitals their own way: unreserved ad slots, banners that push content, embeds that resize, ad tech on the main thread. The fix for each, with code and a per-template checklist.Updated 25 Sept 2026 - Speed8 min read
Core Web Vitals for site owners — LCP, INP and CLS without jargon
Google measures three things about how a page feels: how fast the main content shows up, how quickly it reacts to taps, and whether it jumps around. This guide explains each in plain terms, what "good" means, where the numbers come from, and the usual cause behind each failing one.Updated 25 Sept 2026 - Speed13 min read
Core Web Vitals history: reading 40 weeks of real-user data
A speed test shows how a page performs today. Forty weeks of Chrome UX Report data show when it changed, so you can find the update, plugin or image behind a drop and know when a fix has landed.Updated 25 Sept 2026 - Speed13 min read
Critical CSS: is it still worth doing in 2026?
Critical CSS inlines the styles for the first screen and loads the rest later. Learn when it still pays, what it costs to maintain, the simpler fixes to try first and how to measure the difference.Updated 25 Sept 2026 - Speed12 min read
DOM size: why 3,000 nodes is a problem and how to shrink a page
A page with thousands of HTML elements is slow to style, lay out and react to taps. Find where the nodes come from, count them yourself, and cut them with builder settings and content-visibility.Updated 25 Sept 2026 - Speed13 min read
Field data vs lab data: why PageSpeed and Search Console disagree
Lab data is one throttled test run; field data is 28 days of real Chrome visitors. Why the two disagree, which one Google ranks with, and what to do in each of the four combinations.Updated 25 Sept 2026 - Speed14 min read
Fonts: system stack vs web font, the honest trade-off
A web font costs 100–300 KB, a blocking stylesheet and a layout shift; a system stack costs brand consistency. Measure both on your page, see what moves in FCP, LCP and CLS, and pick with numbers.Updated 25 Sept 2026 - Speed11 min read
How to fix Cumulative Layout Shift (CLS): images, fonts, ads, embeds
Find the element that makes your page jump, then reserve its space with width and height, aspect-ratio or a min-height slot. Covers images, ads, embeds, banners and web fonts, with code.Updated 25 Sept 2026 - Speed12 min read
How to fix Interaction to Next Paint (INP) and slow taps
INP measures how long your page takes to react to a tap or click. Learn what makes it slow, how to find the interaction at fault, and fix it by breaking up long tasks and trimming scripts.Updated 25 Sept 2026 - Speed13 min read
How to fix Largest Contentful Paint (LCP), step by step
Find the element that decides your LCP, see which of its four parts is slow, and fix them in the order that pays off most, from preloading the hero to a faster server. With HTML and WordPress code.Updated 25 Sept 2026
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