Ad networks impact WordPress sites
Ad networks ranked by performance impact.
1
At a glance the headline numbers for Ad networks impact
Ad networks ranked by performance impact.
6
Providers ranked
After min-sites filter
6,105
Sites in sample
Combined across all items
0.09
Best CLS (p75)
Criteo
The State of Web Vitals · October 2026 · WordPress sites (63,295) · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Criteo | 0.09 | 79.3% | 53 | |
| 2 | Prebid.js | 0.12 | 69.6% | 273 | |
| 3 | Google AdSense | 0.12 | 72.5% | 4,815 | |
| 4 | Google Publisher Tag/GAM | 0.13 | 67.0% | 811 | |
| 5 | Amazon Publisher Services | 0.14 | 55.3% | 70 | |
| 6 | Taboola | 0.15 | 65.0% | 83 |
The State of Web Vitals · October 2026 · WordPress sites (63,295) · desktop field datacorewebvitals.io/state-of-cwv
3
Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
Criteo 0.1% 53 0.09
Google AdSense 7.6% 4,815 0.12
Prebid.js 0.4% 273 0.12
Google Publisher Tag/GAM 1.3% 811 0.13
Taboola 0.1% 83 0.15
Amazon Publisher Services 0.1% 70 0.14
Index Exchange 0% 11 0.16
Media.net 0% 6 0.10
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
73% of Google AdSense sites pass CLS. Google Publisher Tag/GAM trails 6 points behind, leaving 33% of its sites failing. computed
The State of Web Vitals · October 2026 · WordPress sites (63,295) · 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 AdSense 7.6%
732.6s
9978ms
730.12
632.2s
331.8s
Google Publisher Tag/GAM 1.3%
782.3s
9987ms
670.13
701.9s
451.4s
Prebid.js 0.4%
822.2s
9887ms
700.12
751.8s
541.2s
Taboola 0.1%
832.0s
9688ms
650.15
821.6s
511.2s
Amazon Publisher Services 0.1%
752.4s
10081ms
550.14
771.7s
63984ms
Criteo 0.1%
692.7s
9688ms
790.09
692.1s
421.4s
Index Exchange 0%
642.6s
10087ms
550.16
642.0s
461.3s
Media.net 0%
03.0s
10074ms
500.10
02.6s
02.5s
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.
Google AdSense leads on CLS: 73% of its sites pass. Google Publisher Tag/GAM trails at 67%. computed
The State of Web Vitals · October 2026 · WordPress sites (63,295) · desktop field datacorewebvitals.io/state-of-cwv
Related signals JS libraries (26) → Email marketing (8) → Font services (4) → CDN (16) → 203,892 crawled sites with Chrome field data, representing millions of real page loads · How we measured
203,892 crawled sites with Chrome field data, representing millions of real page loads. How we measured.