1
At a glance the headline numbers for Ad networks impact
Ad networks ranked by performance impact.
2
Providers ranked
After min-sites filter
944
Sites in sample
Combined across all items
0.02
Best CLS (p75)
Google AdSense
The State of Web Vitals · October 2026 · React sites (9,570) · all devices field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Google AdSense | 0.02 | 90.4% | 863 | |
| 2 | Google Publisher Tag/GAM | 0.09 | 79.2% | 81 |
The State of Web Vitals · October 2026 · React sites (9,570) · all devices field datacorewebvitals.io/state-of-cwv
3
Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
Index Exchange 0.1% 6 0.00
Google AdSense 9% 863 0.02
Criteo 0.2% 19 0.09
Prebid.js 0.2% 18 0.09
Taboola 0.1% 5 0.08
Amazon Publisher Services 0.1% 5 0.10
Google Publisher Tag/GAM 0.8% 81 0.09
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good CLS (0.1 at p75) · one value per site
The State of Web Vitals · October 2026 · React sites (9,570) · all devices field datacorewebvitals.io/state-of-cwv
4
All five vitals at once the whole category without toggling - cell is the pass rate, small number the p75
LCP
INP
CLS
FCP
TTFB
Google AdSense 9%
752.5s
93128ms
900.02
702.0s
531.5s
Google Publisher Tag/GAM 0.8%
772.2s
63259ms
790.09
791.7s
63948ms
Criteo 0.2%
792.3s
63241ms
900.09
791.4s
53965ms
Prebid.js 0.2%
722.5s
83165ms
890.09
781.4s
72777ms
Index Exchange 0.1%
832.2s
100154ms
1000.00
1001.1s
100446ms
Taboola 0.1%
752.8s
75236ms
800.08
602.0s
40835ms
Amazon Publisher Services 0.1%
1001.9s
80190ms
800.10
1001.2s
100399ms
60%95%+ passing Cell: pass rate, small number = p75 · faded rows: under 100 sites
One row per provider, one column per vital - the cell is the share of sites passing, the small number the p75. No toggling needed to see where the category actually differs.
The State of Web Vitals · October 2026 · React sites (9,570) · all devices field datacorewebvitals.io/state-of-cwv
Related signals JS libraries (26) → Email marketing (8) → Font services (4) → CDN (16) → 210,902 crawled sites with Chrome field data, representing millions of real page loads · How we measured
210,902 crawled sites with Chrome field data, representing millions of real page loads. How we measured.