The Three Core Web Vitals
Google measures page experience through three specific metrics, each targeting a different dimension of how fast and stable your site feels to visitors.
Largest Contentful Paint (LCP)
LCP measures how long it takes for the largest visible element on the page to fully load — usually a hero image or main heading. Google's threshold: under 2.5 seconds is "good," 2.5–4 seconds is "needs improvement," over 4 seconds is "poor."
In our audits, the average LCP for a local business site is 4.8 seconds. The most common cause is unoptimized images — a 3MB JPEG on a hero section that could be a 180KB WebP. The fix: convert images to WebP or AVIF, add explicit width and height attributes, and use preloading for above-the-fold images.
Interaction to Next Paint (INP)
INP (which replaced First Input Delay in 2024) measures how quickly your site responds to user interactions — clicks, taps, keyboard input. It captures the full range of interactions during a page visit, not just the first one.
Poor INP usually comes from heavy JavaScript — excessive third-party scripts, bloated CMS plugins, or unoptimized React/Vue applications. For most local business sites built on WordPress, the culprits are typically excessive plugins, heavy theme JavaScript, and unoptimized chatbots or booking widgets.
Cumulative Layout Shift (CLS)
CLS measures visual instability — how much the page content jumps around as it loads. If you've ever started reading a page and had the text suddenly jump down because an ad loaded above it, that's high CLS.
Common causes include images without specified dimensions, ads that inject content above existing text, and web fonts that cause text to reflow. Adding width and height to all images and reserving space for dynamic content (ads, embeds) typically resolves most CLS issues.
How We Benchmark and Fix These
We use a combination of Google Search Console's Core Web Vitals report (which shows real-world data from actual users on your site) and Lighthouse for lab testing. The two often tell different stories — and the field data in Search Console is what actually matters for rankings.
Our typical improvement process: audit both mobile and desktop metrics, identify the top three contributors to each failing metric, implement fixes (image optimization, script deferral, layout reservation), and validate in Search Console. Most sites go from "Poor" to "Good" across all three metrics within 4–6 weeks of targeted fixes.
Does It Actually Affect Rankings?
Yes, but not in isolation. Core Web Vitals are a tiebreaker signal — when two sites are otherwise comparable in relevance and authority, the faster, more stable site wins. In practice, for local businesses competing against similarly-sized local competitors, it often is the tiebreaker.
More importantly, faster sites convert better. A 1-second improvement in LCP increases conversion rates by roughly 7%, according to Google's own data. Even setting aside rankings, fixing your Core Web Vitals pays for itself in improved lead generation. Want to know where your site stands? We run a free technical audit for new clients.