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
1.9s
Best LCP (p75)
Google Publisher Tag/GAM
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by LCP at p75, fastest first
| # | Provider | LCP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Google Publisher Tag/GAM | 1.9s | 88.3% | 2,840 | |
| 2 | Prebid.js | 1.9s | 89.5% | 841 | |
| 3 | Taboola | 1.9s | 88.2% | 482 | |
| 4 | Amazon Publisher Services | 2.0s | 86.6% | 299 | |
| 5 | Criteo | 2.1s | 86.2% | 450 | |
| 6 | Google AdSense | 2.1s | 84.9% | 12,952 |
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
3
Passing LCP per provider which group passes the LCP most often
ProviderSitesPassing LCPp75
Outbrain 0% 25 1.6s
Prebid.js 0.4% 841 1.9s
Index Exchange 0% 45 2.0s
Google Publisher Tag/GAM 1.5% 2,840 1.9s
Taboola 0.3% 482 1.9s
Amazon Publisher Services 0.2% 299 2.0s
Criteo 0.2% 450 2.1s
Google AdSense 6.8% 12,952 2.1s
Media.net 0% 21 2.8s
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
90% of Prebid.js sites pass LCP. Google AdSense trails 5 points behind. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop 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%
881.9s
9786ms
680.13
861.4s
71870ms
Amazon Publisher Services 0.2%
872.0s
9599ms
640.14
881.3s
78745ms
Criteo 0.2%
862.1s
95115ms
660.13
861.5s
69926ms
Outbrain 0%
911.6s
9165ms
700.12
961.2s
78731ms
Index Exchange 0%
882.0s
10079ms
580.14
881.3s
74813ms
Google AdSense 6.8%
852.1s
9882ms
740.11
801.6s
591.2s
Prebid.js 0.4%
901.9s
9689ms
630.14
891.4s
74838ms
Taboola 0.3%
881.9s
9890ms
690.13
881.4s
77754ms
Media.net 0%
572.8s
100170ms
570.22
572.4s
502.0s
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: 90% of its sites pass. Google AdSense trails at 85%. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop 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.