93.7% of React sites use Google AdSense ad networks, and 64% of those sites pass all three Core Web Vitals, against 76% of all React sites.
93.7% of React sites use Google AdSense ad networks, and 75% of those sites have a good LCP, against 85% of all React sites.
93.7% of React sites use Google AdSense ad networks, and 93% of those sites have a good INP, against 95% of all React sites.
93.7% of React sites use Google AdSense ad networks, and 90% of those sites have a good CLS, against 92% of all React sites.
The State of Web Vitals · October 2026 · React: 9,570 crawled sites · 9,110 with all devices field data · 921 sites with ad networksBy Arjen Karel · corewebvitals.io/state-of-cwv
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Core Web Vitals pass rate
Sites with Google AdSense ad networks pass all three Core Web Vitals most often: 64%, against 76% of all React sites.
Sites with Google AdSense ad networks have a good LCP most often: 75%, against 85% of all React sites.
Sites with Google AdSense ad networks have a good INP most often: 93%, against 95% of all React sites.
Sites with Google AdSense ad networks have a good CLS most often: 90%, against 92% of all React sites.
SitesAll three good · at least one needs improvement · at least one poor
All React sites9,11076%
Index Exchange 0.7%683%
Google AdSense 93.7%82364%
Amazon Publisher Services (TAM/UAM) 0.5%560%
Prebid.js Header Bidding 2.0%1856%
Criteo 2.1%1942%
Google Publisher Tag (GPT) 8.8%7739%
Taboola 0.5%525%
SitesGood, needs improvement, poor LCPMedian
All React sites9,11085%1.4s
Amazon Publisher Services (TAM/UAM) 0.5%5100%1.6s
Index Exchange 0.7%683%2.2s
Criteo 2.1%1979%1.9s
Google Publisher Tag (GPT) 8.8%7777%1.8s
Taboola 0.5%575%2.0s
Google AdSense 93.7%82375%1.8s
Prebid.js Header Bidding 2.0%1872%2.0s
SitesGood, needs improvement, poor INPMedian
All React sites9,11095%80ms
Index Exchange 0.7%6100%151ms
Google AdSense 93.7%82393%92ms
Prebid.js Header Bidding 2.0%1883%147ms
Amazon Publisher Services (TAM/UAM) 0.5%580%158ms
Taboola 0.5%575%125ms
Criteo 2.1%1963%184ms
Google Publisher Tag (GPT) 8.8%7763%163ms
SitesGood, needs improvement, poor CLSMedian
All React sites9,11092%0.00
Index Exchange 0.7%6100%0.00
Google AdSense 93.7%82390%0.00
Criteo 2.1%1989%0.02
Prebid.js Header Bidding 2.0%1889%0.06
Amazon Publisher Services (TAM/UAM) 0.5%580%0.09
Taboola 0.5%580%0.03
Google Publisher Tag (GPT) 8.8%7779%0.08
GoodNeeds improvementPoorSites: with Chrome field data
The State of Web Vitals · October 2026 · React: 9,570 crawled sites · 9,110 with all devices field data · 921 sites with ad networksBy Arjen Karel · corewebvitals.io/state-of-cwv
Google AdSense is the most used: 93.7% of React sites.
Sites using each option (sites can use more than one) 921 sites
Google AdSense 93.7%
Google AdSense 93.7% Google Publisher Tag (GPT) 8.8% Criteo 2.1% Prebid.js Header Bidding 2.0% Index Exchange 0.7% Amazon Publisher Services (TAM/UAM) 0.5% Taboola 0.5%
The State of Web Vitals · October 2026 · React: 9,570 crawled sites · 9,110 with all devices field data · 921 sites with ad networksBy Arjen Karel · corewebvitals.io/state-of-cwv
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How ad networks affect the four LCP phases
Median LCP phase breakdown (Chrome field p75) Load delay Median LCP
React sites with ad networks 663733 ms475 ms475 mslab 475 ms1.8s
Google Publisher Tag (GPT) 59602 ms385 ms316 ms385 mslab 385 ms2.0s
Google AdSense 621737 ms484 ms484 mslab 484 ms1.8s
TTFB Resource load delay Resource load time Element render delay
The State of Web Vitals · October 2026 · React: 9,570 crawled sites · 9,110 with all devices field data · 921 sites with ad networksBy Arjen Karel · corewebvitals.io/state-of-cwv
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Ad networks per platform
Wix sets the ad networks to Google AdSense on 100% of its sites, and 90% of Wix sites pass all three Core Web Vitals, against 76% of all sites.
Wix sets the ad networks to Google AdSense on 100% of its sites, and 94% of Wix sites have a good LCP, against 85% of all sites.
Wix sets the ad networks to Google AdSense on 100% of its sites, and 97% of Wix sites have a good INP, against 95% of all sites.
Wix sets the ad networks to Google AdSense on 100% of its sites, and 98% of Wix sites have a good CLS, against 92% of all sites.
PlatformAd networks on its sitesPass all threeGood LCPGood INPGood CLS
React sites with ad networks 921 sitesGoogle AdSense 94%76%85%95%92%
Wix 509 sitesGoogle AdSense 100%90%94%97%98% Google AdSense Google Publisher Tag (GPT) Criteo Prebid.js Header Bidding Index Exchange Amazon Publisher Services (TAM/UAM) Taboola
The State of Web Vitals · October 2026 · React: 9,570 crawled sites · 9,110 with all devices field data · 921 sites with ad networksBy Arjen Karel · corewebvitals.io/state-of-cwv