93.7% of React sites use Google AdSense ad networks, and 58% of those sites pass all three Core Web Vitals, against 74% of all React sites.
93.7% of React sites use Google AdSense ad networks, and 72% of those sites have a good LCP, against 84% of all React sites.
93.7% of React sites use Google AdSense ad networks, and 88% of those sites have a good INP, against 92% 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 · 5,488 with phone 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: 58%, against 74% of all React sites.
Sites with Google AdSense ad networks have a good LCP most often: 72%, against 84% of all React sites.
Sites with Google AdSense ad networks have a good INP most often: 88%, against 92% 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 sites5,48874%
Index Exchange 0.7%683%
Google AdSense 93.7%49758%
Prebid.js Header Bidding 2.0%1656%
Google Publisher Tag (GPT) 8.8%5345%
Amazon Publisher Services (TAM/UAM) 0.5%540%
Criteo 2.1%1932%
Taboola 0.5%50%
SitesGood, needs improvement, poor LCPMedian
All React sites5,48884%1.4s
Amazon Publisher Services (TAM/UAM) 0.5%5100%1.6s
Index Exchange 0.7%683%2.2s
Prebid.js Header Bidding 2.0%1675%2.0s
Criteo 2.1%1974%1.9s
Google AdSense 93.7%49772%1.8s
Google Publisher Tag (GPT) 8.8%5372%1.9s
Taboola 0.5%550%2.0s
SitesGood, needs improvement, poor INPMedian
All React sites5,48892%90ms
Index Exchange 0.7%6100%150ms
Google AdSense 93.7%49788%113ms
Prebid.js Header Bidding 2.0%1681%150ms
Google Publisher Tag (GPT) 8.8%5371%156ms
Amazon Publisher Services (TAM/UAM) 0.5%560%170ms
Criteo 2.1%1953%185ms
Taboola 0.5%550%153ms
SitesGood, needs improvement, poor CLSMedian
All React sites5,48892%0.00
Index Exchange 0.7%6100%0.00
Google AdSense 93.7%49790%0.00
Criteo 2.1%1989%0.02
Prebid.js Header Bidding 2.0%1688%0.01
Amazon Publisher Services (TAM/UAM) 0.5%580%0.08
Taboola 0.5%580%0.00
Google Publisher Tag (GPT) 8.8%5375%0.05
GoodNeeds improvementPoorSites: with Chrome field data
The State of Web Vitals · October 2026 · React: 9,570 crawled sites · 5,488 with phone 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 · 5,488 with phone 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 415679 ms478 mslab 477 ms1.8s
Google AdSense 386652 ms487 mslab 489 ms1.8s
Google Publisher Tag (GPT) 44560 ms785 ms785 mslab 841 ms1.9s
TTFB Resource load delay Resource load time Element render delay
The State of Web Vitals · October 2026 · React: 9,570 crawled sites · 5,488 with phone 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 89% of Wix sites pass all three Core Web Vitals, against 74% 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 84% of all sites.
Wix sets the ad networks to Google AdSense on 100% of its sites, and 96% of Wix sites have a good INP, against 92% of all sites.
Wix sets the ad networks to Google AdSense on 100% of its sites, and 97% 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%74%84%92%92%
Wix 509 sitesGoogle AdSense 100%89%94%96%97% 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 · 5,488 with phone field data · 921 sites with ad networksBy Arjen Karel · corewebvitals.io/state-of-cwv