1
At a glance the headline numbers for Ad networks impact
Ad networks ranked by performance impact.
6
Providers ranked
After min-sites filter
9,463
Sites in sample
Combined across all items
2.0s
Best LCP (p75)
Prebid.js
The State of Web Vitals · Q1 2026 · 94,910 sites · all devices field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by LCP at p75, fastest first
| # | Provider | LCP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Prebid.js | 2.0s | 86.7% | 441 | |
| 2 | Amazon Publisher Services | 2.0s | 87.2% | 158 | |
| 3 | Google Publisher Tag/GAM | 2.1s | 84.3% | 1,487 | |
| 4 | Taboola | 2.3s | 81.9% | 247 | |
| 5 | Google AdSense | 2.4s | 78.9% | 6,899 | |
| 6 | Criteo | 2.4s | 79.7% | 231 |
The State of Web Vitals · Q1 2026 · 94,910 sites · all devices field datacorewebvitals.io/state-of-cwv
3
Passing LCP per provider which group passes the LCP most often
ProviderSitesPassing LCPp75
Outbrain 0% 8 2.0s
Amazon Publisher Services 0.2% 158 2.0s
Prebid.js 0.5% 441 2.0s
Google Publisher Tag/GAM 1.6% 1,487 2.1s
Taboola 0.3% 247 2.3s
Criteo 0.2% 231 2.4s
Index Exchange 0% 24 2.3s
Google AdSense 7.3% 6,899 2.4s
Media.net 0% 8 3.5s
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good LCP (2.5s at p75) · one value per site
87% of Amazon Publisher Services sites pass LCP. Google AdSense trails 8 points behind. computed
The State of Web Vitals · Q1 2026 · 94,910 sites · 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 7.3%
792.4s
90150ms
830.07
731.9s
521.3s
Google Publisher Tag/GAM 1.6%
842.1s
87161ms
760.10
831.6s
69916ms
Prebid.js 0.5%
872.0s
86157ms
690.13
871.5s
77777ms
Taboola 0.3%
822.3s
79179ms
690.14
801.7s
72851ms
Criteo 0.2%
802.4s
78183ms
720.13
761.8s
601.1s
Amazon Publisher Services 0.2%
872.0s
83164ms
690.14
871.5s
79742ms
Index Exchange 0%
792.3s
92151ms
670.13
831.4s
79786ms
Outbrain 0%
882.0s
88149ms
750.10
881.3s
63843ms
Media.net 0%
503.5s
83171ms
500.91
502.5s
141.8s
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.
Prebid.js leads on LCP: 87% of its sites pass. Google AdSense trails at 79%. computed
The State of Web Vitals · Q1 2026 · 94,910 sites · all devices field datacorewebvitals.io/state-of-cwv
Related signals JS libraries (22) → Email marketing (7) → Font services (4) → CDN (15) → Chrome field data from 94,910 sites, representing millions of real page loads · How we measured
Chrome field data from 94,910 sites, representing millions of real page loads. How we measured.