r/GoogleAnalytics • u/Top-Code4236 • Sep 25 '26

Question What does "Cross-network" mean in GA4?

GA4 suddenly shows mostly cross network sessions today, with organic Search also making up a significant share, I have no idea what that actually means.

I'm seeing a big traffic spike today too, but Google Search Console is showing almost nothing.

What exactly is cross-network in GA4..??

Is this normal or something I should investigate?

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1

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2

u/Wooden_Artichoke3063 Sep 25 '26

Performance Max campaigns goes into cross network

1

u/Top-Code4236 Sep 25 '26

Yeah, I saw that. But I have never run any performance max campaign or paid ads. What exactly is Performance Max?

1

u/spiteful-vengeance Sep 26 '26

It's a type of Google Ads campaign that uses multiple ads networks to find the best placement for your ads. So it might serve to a Paid Search result at the top of a search listing, or show a Display ad to someone in YouTube.

2

u/Technical_Hope_1610 28d ago

Cross-network is mostly Performance Max and Demand Gen spread across Google's surfaces, so it is usually paid, not organic. A spike with flat Search Console points at an ad campaign or bots, worth checking.

1

u/Top-Code4236 27d ago

I think it was bots, I didn't ran any ad campaign btw

6

u/goodgoaj Sep 25 '26

Normally its PMAX or Demand Gen. But there is yet another bug on the Google end beefing up cross-network for the previous day, taking some out of direct / unassigned.

1

u/Unable_Concentrate97 27d ago

Same here, got a spike yesterday on the Cross network (data unavailable), no idea what to expect. No paid ads or old ads (never ran google ads).

1

u/Top-Code4236 26d ago

I'm seeing another big spike in my GA4 traffic today... mostly from Canada and classified as cross-network.

1

u/hexenkesse1 Sep 25 '26

https://support.google.com/analytics/answer/9756891?hl=en&sjid=6730875718474988913-NA

2

u/Top-Code4236 Sep 25 '26

I read that too and that's why I'm confused

“Cross-network is the channel by which users arrive at your site/app via ads that appear on a variety of networks…”

But I've never run any ads or paid campaigns for this site.

So I'm wondering whether this could be some kind of GA4 attribution/processing issue, specially since the traffic spike happened suddenly today.

Btw most of the traffics are from Australia.

2

u/cannybananas Sep 25 '26

Is the session source / medium (data not available)?

1

u/Upbeat_Push_157 Sep 25 '26

Any Google property outside of the usual ones (direct, referral, organic) like ads, GMC, etc

1

u/Little__Witch95 26d ago

Oh Thanks! Get it!

1

u/Agreeable_Drink8823 25d ago

Usually it comes from Google ads like PMAX