The State of Web Vitals

Ad networks impact

Ad networks ranked by performance impact.

Field data PhoneDesktopAll Scope All sites Q2 2026 edition · All devices field outcomes
Metric LCP INP CLS
1

At a glance the headline numbers for Ad networks impact

Ad networks ranked by performance impact.

6
Providers ranked
After min-sites filter
17,836
Sites in sample
Combined across all items
0.07
Best CLS (p75)
Google AdSense
The State of Web Vitals · Q2 2026 · 189,915 sites · 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 0.07 82.9%
12,936
2 Google Publisher Tag/GAM 0.11 75.0%
2,834
3 Prebid.js 0.12 70.6%
837
4 Amazon Publisher Services 0.13 67.6%
298
5 Criteo 0.13 70.6%
450
6 Taboola 0.14 68.6%
481
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
3

Passing CLS per provider which group passes the CLS most often

ProviderSitesPassing CLSp75
Outbrain 0% 25 84% 0.08
Google AdSense 6.8% 12,936 83% 0.07
Google Publisher Tag/GAM 1.5% 2,834 75% 0.11
Index Exchange 0% 45 73% 0.11
Prebid.js 0.4% 837 71% 0.12
Criteo 0.2% 450 71% 0.13
Taboola 0.3% 481 69% 0.14
Amazon Publisher Services 0.2% 298 68% 0.13
Media.net 0% 21 38% 0.92
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

83% of Google AdSense sites pass CLS. Amazon Publisher Services trails 15 points behind, leaving 32% 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 AdSense 6.8%
782.4s
90151ms
830.07
721.9s
521.3s
Google Publisher Tag/GAM 1.5%
842.1s
87162ms
750.11
831.6s
68930ms
Prebid.js 0.4%
862.1s
86159ms
710.12
851.6s
74839ms
Taboola 0.3%
782.4s
80184ms
690.14
751.8s
66980ms
Criteo 0.2%
732.6s
78188ms
710.13
721.9s
561.1s
Amazon Publisher Services 0.2%
852.1s
80172ms
680.13
861.5s
79731ms
Index Exchange 0%
872.2s
93146ms
730.11
841.4s
80645ms
Outbrain 0%
801.9s
88141ms
840.08
881.3s
72843ms
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.

Google AdSense leads on CLS: 83% of its sites pass. Amazon Publisher Services trails at 68%. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
Related signals JS libraries (23) → Email marketing (8) → Font services (4) → CDN (15) → Chrome field data from 189,915 sites, representing millions of real page loads · How we measured