Google Publisher Tag vs MainAd
Head-to-head usage across the sites we track.
Top sites by authority
Google Publisher Tag · MainAd · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
70
2
Open Page Rank 8+
1,185
7
Open Page Rank 7+
5,440
30
Open Page Rank 6+
10,495
44
Open Page Rank 5+
17,037
85
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Google Publisher Tag · MainAd · share of sites in each country using one or the other
United States
77,333
334
Canada
41,155
210
United Kingdom
40,696
360
India
32,440
226
Germany
31,191
290
France
29,042
289
Australia
27,204
165
Spain
26,508
278
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Google Publisher Tag | MainAd |
|---|---|---|
| LCP | 1.9 s | 2 s |
| INP | 100 ms | 150 ms |
| CLS | 0.05 | 0 |
| TTFB | 800 ms | 700 ms |
Median site's p75 values from the Chrome UX Report, Jun 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.