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+
72
2
Open Page Rank 8+
1,186
6
Open Page Rank 7+
5,411
26
Open Page Rank 6+
10,428
39
Open Page Rank 5+
16,880
76
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
69,673
275
United Kingdom
36,190
297
Canada
35,821
166
India
28,780
184
Germany
27,542
236
France
24,581
235
Australia
24,114
138
Spain
23,313
223
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Google Publisher Tag | MainAd |
|---|---|---|
| LCP | 1.9 s | 1.9 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, Aug 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.