Core Web Vitals
SEOAlso: CWV · Web Vitals
Quick definition
Core Web Vitals are three things Google measures to decide if a web page feels good to use: how fast it loads, how quickly it reacts when you tap something, and whether stuff jumps around as it loads. Pages that pass all three get a green light. Pages that fail any one get penalised.
How it varies across Australia
Australian sites trail the global average on Core Web Vitals across most industries. The widest gaps show up in retail and finance, where heavy templates and third-party tracking scripts slow the loading and response metrics. The improvement available from fixing them is usually bigger than any single SEO change.
Compare site performance across Australian industries →The three things it measures
How long the main visible thing on the page takes to show up.
Pass: under 2.5 secondsHow quickly the page reacts when you tap or click something.
Pass: under 200msWhether elements jump around as the page loads.
Pass: under 0.1 shift scoreWhat it actually means
Think about visiting a house. The three things Google measures are: how long you wait at the door, how quickly the door opens when you ring the bell, and whether the house stays still as you walk in.
Each one has a name, an acronym and a threshold (see above).
The trick most teams miss: Google scores you on what real people experience, not what your testing tool says. The data comes from the Chrome User Experience Report (CrUX), which collects anonymous performance data from actual Chrome users. The lab test in PageSpeed Insights is a useful guide, but the number that decides your ranking is the one from real visitors.
Core Web Vitals reward sites that respect the user's time. The penalty for ignoring them is invisible until your competitor moves above you.
How to calculate it
Pass = three thresholds met: loading under 2.5s, response under 200ms, no jumpy layout
Worked example. Your page loads its main content in 3.2 seconds (over the 2.5-second limit), reacts to taps in 180 milliseconds (under the 200ms limit), and has a stability score of 0.05 (under the 0.1 limit). Two pass, one fails. Result: the page does not pass Core Web Vitals. All three thresholds have to be met at the same time.
The Australian context
Pages take longer to load for Australian visitors than for US visitors when the servers and content delivery networks are based overseas. The physical distance the data has to travel matters more than most teams realise. Sites hosted only in the US can pass the lab test but fail the real-user data for Australian visitors specifically.
If your audience is mostly Australian, hosting or caching content in Sydney is usually the single biggest performance win available. The improvement shows up in the real-user data within two to three weeks.
Where people get this wrong
Related terms
Common questions
What counts as a passing Core Web Vitals score?
All three metrics have to clear their thresholds. Loading (LCP) under 2.5 seconds, response (INP) under 200 milliseconds, layout stability (CLS) under 0.1. Pass two and fail one and the page still fails overall.
Where does Google get the data from?
From real Chrome users who opt in to share performance data. The aggregated feed is called the Chrome User Experience Report, usually shortened to CrUX. That's the source Google uses for ranking. Your local Lighthouse run is useful for diagnosis but isn't what ranks you.
How long does it take to see improvements?
The real-user data Google uses is a 28-day rolling average. A fix shipped today shows up gradually over the next month as more post-fix sessions enter the average. Don't expect overnight movement.
How much do Core Web Vitals affect rankings?
Google calls them a small direct ranking signal. The bigger effect is indirect: faster pages convert better, retain visitors longer, and feed every other signal Google weights heavily (engagement, return visits, conversion). Treat Web Vitals as a multi-channel multiplier.
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About New Rebellion
New Rebellion is a marketing intelligence consultancy. We build tools, score Australian businesses on how their marketing actually performs, and publish Debrief every day. This dictionary is part of how we work in the open.
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