The State of Web Vitals

Ad networks impact

Ad networks ranked by performance impact.

Field data PhoneDesktopAll Scope All sites Q2 2026 edition · Desktop 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
0.11
Best CLS (p75)
Google AdSense
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
2

The ranking sorted by CLS at p75, fastest first

# Provider CLS p75 Passing Sites
1 Google AdSense 0.11 74.2%
12,936
2 Amazon Publisher Services 0.13 64.7%
298
3 Criteo 0.13 66.3%
450
4 Taboola 0.13 68.4%
481
5 Google Publisher Tag/GAM 0.13 68.0%
2,834
6 Prebid.js 0.14 62.9%
837
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
3

Passing CLS per provider which group passes the CLS most often

ProviderSitesPassing CLSp75
Google AdSense 6.8% 12,936 74% 0.11
Outbrain 0% 25 70% 0.12
Taboola 0.3% 481 68% 0.13
Google Publisher Tag/GAM 1.5% 2,834 68% 0.13
Criteo 0.2% 450 66% 0.13
Amazon Publisher Services 0.2% 298 65% 0.13
Prebid.js 0.4% 837 63% 0.14
Index Exchange 0% 45 58% 0.14
Media.net 0% 21 57% 0.17
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

74% of Google AdSense sites pass CLS. Prebid.js trails 11 points behind, leaving 37% of its sites failing. 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 AdSense 6.8%
852.1s
9982ms
740.11
801.6s
591.2s
Google Publisher Tag/GAM 1.5%
881.9s
9886ms
680.13
861.4s
71869ms
Prebid.js 0.4%
901.9s
9789ms
630.14
891.4s
74838ms
Taboola 0.3%
881.9s
9891ms
680.13
881.4s
77753ms
Criteo 0.2%
862.1s
95115ms
660.13
861.5s
69923ms
Amazon Publisher Services 0.2%
872.0s
9597ms
650.13
891.3s
78744ms
Index Exchange 0%
882.0s
10079ms
580.14
881.3s
74795ms
Outbrain 0%
911.6s
9165ms
700.12
961.2s
78697ms
Media.net 0%
572.7s
100149ms
570.17
572.3s
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.

Google AdSense leads on CLS: 74% of its sites pass. Prebid.js trails at 63%. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · desktop 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