What Are Core Web Vitals?
Core Web Vitals are LCP, INP and CLS. Passing means 2.5 seconds, 200 milliseconds and 0.1 respectively, measured at the 75th percentile of real Chrome visits.
Read the guide → July 29, 2026 good pagespeed scoreWhat Is a Good PageSpeed Score?
Lighthouse bands 90 to 100 as good, but the score is a lab composite and not a ranking signal. Core Web Vitals field data is the assessment that actually counts.
Read the guide → July 22, 2026 improve largest contentful paintHow Do You Improve Largest Contentful Paint?
Identify the LCP element, then remove what delays it: slow TTFB, render-blocking CSS and JS, lazy loading on the hero image, and unpreloaded fonts. Target 2.5 seconds.
Read the guide → July 15, 2026 cumulative layout shiftWhat Is Cumulative Layout Shift?
CLS measures unexpected movement of visible content during load. Good is 0.1 or below. Most failures come from images without dimensions, injected banners and late-loading fonts.
Read the guide → July 8, 2026 lab data vs field dataWhat Is the Difference Between Lab Data and Field Data?
Lab data is a reproducible synthetic run used to diagnose causes. Field data is real Chrome users over 28 days and is what Google assesses. Diagnose in lab, confirm in field.
Read the guide → July 1, 2026 does page speed affect seoDoes Page Speed Affect SEO?
Core Web Vitals are a confirmed but modest ranking signal, described by Google as a tiebreaker between comparable pages. Abandonment and conversion effects are usually larger.
Read the guide → June 24, 2026 reduce time to first byteHow Do You Reduce Time to First Byte?
TTFB sets the floor for LCP. Target under 800 milliseconds through full-page caching, a CDN, faster database queries and collapsing redirect chains to a single hop.
Read the guide → June 17, 2026 mobile pagespeed score lowerWhy Is Your Mobile Score Lower Than Desktop?
Lighthouse throttles mobile CPU and network far harder than desktop. A twenty to thirty point gap is normal; a larger one usually means JavaScript weight is the bottleneck.
Read the guide → June 10, 2026 improve interaction to next paintHow Do You Improve Interaction to Next Paint?
INP measures how long a page takes to respond visually to a tap. Target 200 milliseconds by breaking up long tasks, deferring non-urgent work and trimming third-party scripts.
Read the guide → June 3, 2026