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Adsense Coverage Dropped on mobile

     
12:10 pm on Sep 7, 2018 (gmt 0)

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Hey everyone,

I'm facing a very strange problem for last few days.

The coverage of my Adsense account dropped to ~45%, but on mobile devices only. On desktop/tablet devices the coverage is standard 97%+.

That being said, I didn't make any changes recently, so really don't have any idea what could be wrong.

Any ideas?

Thanks!
12:36 pm on Sept 7, 2018 (gmt 0)

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Me too. Glad Iím not alone.
12:37 pm on Sept 7, 2018 (gmt 0)

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Must be some bidding issue maybe
2:35 pm on Sept 7, 2018 (gmt 0)

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Have you segmented your traffic further than just mobile vs desktop, such as geographically? Is this specific to a segment?

For the record, I'm not impacted by this.
2:41 pm on Sept 7, 2018 (gmt 0)

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Yes, I've tried segmenting by GEO but all GEOs are having the similar coverage. :(
8:58 pm on Sept 7, 2018 (gmt 0)

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Yes ditto all the same mine also happened on the 4th of September. Nothing on site changed. It appears to be just mobile traffic
2:08 am on Sept 8, 2018 (gmt 0)

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I have no idea. It seems strange. Has CTR been significantly higher on mobile than desktop? I have a difference of 0.1% higher CTR for mobile.
11:34 am on Sept 10, 2018 (gmt 0)

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@Sam: Any news? My coverage on mobile is still <50%.

@nickMNS: Actually the CTR on mobile was lower than desktop, but a little bit higher than tablet.
12:02 pm on Sept 24, 2018 (gmt 0)

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Hi guys, I advise you to check my thread from May when I had issues with mobile coverage / ctr / revenue. I believe that what you are experiencing is similar to my issue back in May.

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8:35 pm on Sept 24, 2018 (gmt 0)

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Do you have crawling issues? They won't serve on pages they can't crawl. Dynamic URLs?

Something is obviously broken or flagged. No reason for Adsense to have coverage that low. There are always people willing to pay on the Adwords side.
5:02 pm on Oct 14, 2018 (gmt 0)

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I am dealing with the same problem. Did you get to the source of the problem?
7:21 am on Oct 15, 2018 (gmt 0)

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I didn't know it, but the same appears to be happening on my (not mobile friendly) site, but it started later.

Sept 1-30, my average coverage on mobile was 74.69%, with a peak of 80.64%. This is right in line with my Ad balance setting.

Oct 1-7, the average was 71.89%.

Oct 8-14, the average was 62.20%, with an obvious dip on Oct 9. Oct 8 the coverage was 76.96%, then on Oct 9 it was 67.45%. It continued down each day from there, until yesterday (Oct 14) was 54.20%. Traffic on Oct 14 was 3% lower than on Oct 8, so that shouldn't have been a factor.
3:21 pm on Oct 15, 2018 (gmt 0)

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@csdude55
The problem happened to me at the same time as yours,I think it's probably a new policy or bug.
It's important to note that on desktop and tablet, everything works normally
here
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8:29 pm on Oct 15, 2018 (gmt 0)

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Sorry that I overlooked your thread, @ariel1238a :-( But yes, with several people reporting the same problem then it's not an issue on your end, it's definitely something more.

Is your site mobile friendly? Mine is not, and I thought that might be the culprit. But Pedro_M said that removing the <meta name="viewport"> tag had an impact, so I'm assuming that means that his site IS mobile friendly. So I don't know, then.

I've been working hard to rebuild my site to be mobile friendly, but with mobile ads already being worth less than desktop then I worry that all of my efforts will just result in less money. But with this new development... I just don't know.
11:23 pm on Oct 15, 2018 (gmt 0)

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Hi, same here. Got a huge drop beginning Sept 14 on mobile. Desktop and tablet are fine. Mobile coverage before Sept 14 was above 90%, then dropped under 20%.
Adsense support told me that the issue was using ads with fixed sizes and too big, but we were just running 336x280 ad units (or smaller).
Our website is responsive and mobile friendly. No notifications on our account. Ads are served through Ad Manager / DFP with dynamic allocation at line item level + house level. Everything is fine with TOS.
After that, i switched to 300x250 ad units and there was a little increase in coverage (up 25% - 30%), had a little uplift in mobile revenue, but still seeing many blank ads on mobile and far from our standard income.
It can't be brand safety update because we have >200k daily uu and our websites has few pages (approx 25k) and homogeneous distribution of pageviews.
We have up to 4 ad units per page, but on medium - long page. Today i tried removing one ad unit, let's see what happens.
8:27 am on Oct 16, 2018 (gmt 0)

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After that, i switched to 300x250 ad units

Why don't yo serve responsive ads, like that it's Adsense deciding which size to adopt.
9:41 am on Oct 16, 2018 (gmt 0)

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Because we'd need to change some settings in our DFP invocation tag, and we are running header bidding, too. I would be fine with 300x250 ad units... if only they were not blank 80% of times.
11:01 am on Oct 16, 2018 (gmt 0)

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Because we'd need to change some settings in our DFP invocation tag, and we are running header bidding, too. I would be fine with 300x250 ad units... if only they were not blank 80% of times.

Does it mean that , while you put in concurrence several sources, the winner (the one being displayed) is Adsense, with empty ads? So why isn't it your other sources over taking empty Adsense ads?

By the way, for your blank ads, use backup ads and serve ads from your other sources.

I serve adsense ads, and when adsense has nothing (for some reasons), adsense runs my backup ads where I select other kind of ads (affiliates, other ad networks, self promotion, etc...)