1
At a glance the headline numbers for Ad networks impact
Ad networks ranked by performance impact.
6
Providers ranked
After min-sites filter
17,864
Sites in sample
Combined across all items
2.1s
Best LCP (p75)
Prebid.js
The State of Web Vitals · Q2 2026 · 189,915 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 | 2.1s | 86.2% | 841 | |
| 2 | Google Publisher Tag/GAM | 2.1s | 84.2% | 2,840 | |
| 3 | Amazon Publisher Services | 2.1s | 84.6% | 299 | |
| 4 | Google AdSense | 2.4s | 78.4% | 12,952 | |
| 5 | Taboola | 2.4s | 77.5% | 482 | |
| 6 | Criteo | 2.6s | 73.1% | 450 |
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
3
Passing LCP per provider which group passes the LCP most often
ProviderSitesPassing LCPp75
Index Exchange 0% 45 2.2s
Prebid.js 0.4% 841 2.1s
Amazon Publisher Services 0.2% 299 2.1s
Google Publisher Tag/GAM 1.5% 2,840 2.1s
Outbrain 0% 25 1.9s
Google AdSense 6.8% 12,952 2.4s
Taboola 0.3% 482 2.4s
Criteo 0.2% 450 2.6s
Media.net 0% 21 3.7s
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
86% of Prebid.js sites pass LCP. Criteo trails 13 points behind, leaving 27% of its sites failing. computed
The State of Web Vitals · Q2 2026 · 189,915 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 Publisher Tag/GAM 1.5%
842.1s
86162ms
750.11
831.6s
68930ms
Amazon Publisher Services 0.2%
852.1s
80171ms
670.14
861.5s
79733ms
Criteo 0.2%
732.6s
77188ms
710.13
721.9s
561.1s
Outbrain 0%
801.9s
88140ms
840.08
881.3s
72843ms
Index Exchange 0%
872.2s
93146ms
730.11
841.4s
80645ms
Google AdSense 6.8%
782.4s
90151ms
830.07
721.9s
521.3s
Prebid.js 0.4%
862.1s
86160ms
700.12
851.6s
74840ms
Taboola 0.3%
782.4s
80183ms
690.14
751.8s
65979ms
Media.net 0%
383.7s
88178ms
380.92
432.5s
201.4s
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: 86% of its sites pass. Criteo trails at 73%. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
Related signals JS libraries (25) → Email marketing (8) → Font services (4) → CDN (16) → Chrome field data from 189,915 sites, representing millions of real page loads · How we measured
Chrome field data from 189,915 sites, representing millions of real page loads. How we measured.