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GMC errors
free listings
Furthermore, it is not possible to check when Google raised the warning on products as Google does not allow to check the data more then 30 days in diagnostic page, but warnings may limit the product listing on the free listings result. This means your product is eligible for the Shopping ads results of Google, but it may have limited visibility in such cases.

Moreover, there are several factors that can lead to a drop in traffic, either in the free listing or in the paid listing of Google. In this case, we suggest you try to rectify those warnings which appear in the diagnostic page of Google Merchant Center and also contact the Google Ads support team to get more details on this matter.

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sexually

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gtin error

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make more assets/videos

What I suspect is that the campaign died because it couldn't reach ROI. You can easily refresh it by adding more assets and videos after to segment the product feed (either by shows or types of products).

When I look at products, those who spent the most budget converted very poorly. Seems like the performance dropped to compensate for that.

Try creating a few search campaigns (not shopping) and target specific keywords that describe the best selling products and go on from there.

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From what I see, it looks like they weren't able to convert and bring ROI, so at some point, your auction bids were too low to bring the volume they used to.

To battle this, it is recommended to "spoonfeed" Google with segmentations in the merchant center. This helps in campaign management and data sharing inside Google.

Adding more assets gives your ads more available potential placements. For example, having a video open up the preroll placement on YouTube.

Having a non-shopping search campaign can give you more control over keywords, so you can make sure it performs well.

These are my recommendations and that what I'd suggest anyone with an account similar to yours.

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new pmax

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set correct tROAS or Remove tROAS or change the bidding strategy (set maximize conversion) for 2 weeks

Your ROAS is very good around 1500% but I can see a decline in total conversions week on week.

You don't use any retargeting and maybe can expand on audience segments. You set your TROAS at 1300 and the actual is 1600 so that is very good.

You are number 5 in an auction after the big companies and that is not too bad. After your change in bid strategy, you are only spending around $5 a day. Your TROAS is limiting your spending.

Just remove troas so Google can spend the money or lower troas

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On October 1, 2023, you increased the tROAS value from 600% to 1300%.
Additionally, a majority of your products transitioned from a 'Ready to serve' status. It appears that either these products were excluded or they were disapproved due to policy reasons
There were also changes in the contributions of the top segment. This means that some of the most popular products, which had previously performed well, experienced a change in status, leading to a decrease in the campaign's cost.
The bid strategy was also affected during the learning period.


We recommend allowing for a discrepancy of up to 15% between the actual tROAS (target return on ad spend) and the target ROAS. To approach the target more closely, the system is reducing your bids to avoid participating in relatively expensive auctions, as this could lead to a deviation from the target. This is the primary reason why we expect traffic fluctuations to occur. Smart bidding is working to lower your bids for the actual ROAS in order to get closer to the average target ROAS.

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Regarding the campaign PMax: Smart Shopping 3, it had a huge difference between target ROAS (500%) and actual ROAS (1805%), if analysing the period from 27/09 till 04/10 what the campaign was serving. We recommend keeping the difference between target and actual ROAS no more than 15%. Or if ROI is not the priority - set maximize conversions or maximize conversions value bid strategy without any target CPA or target ROAS and run it like that for 2 weeks at least.



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Make more campaigns

14,000 products and just 1 campaign

I reviewed your account.

You have 1 campaign with a correct conversion structure. Having the correct conversion structure is important.

Your ROAS is good, but the problem is scaling the sales and the costs.

Your conversion rate is 0.65% which is not great, but still you are getting good results since the CPC is super low which is $0,11

This low CPC and not spending the budget are both about the very strict target ROAS which is 1,300

This kind of a goal prevents your campaign from spending its daily budget because Google has to bid really low to achieve this goal.

As a result, you get cheap clicks but a low volume. If you decrease it gradually, you'll see more expensive cost per clicks, yet more traffic and sales. So, a better revenue but a lower ROAS.

You have 14,000 products and just 1 campaign for them all.

While some of your products spend most of your budget, most of the products can not find a place to be shown and they have 0 impressions, 0 clicks. There might be a potential there.

Most of your conversions are coming from Pokemon related products like;

GX EX Collection: Pokemon Cards, 60 MEGA
Pokemon Series GBA Game Cartridge Emerald/Ruby/FireRed/LeafGreen/Sapphire, Emerald Game Pack
27-54pcs/set Pokemon Cards Vmax GX Energy Card Collection, 54pcs Box - 2 conversions
Pokemon Crystal 3D Lamp, 7
Latest Pokemon Series Metal Cards, metal card-N

And conversion rates and ROAS of these products are really high.

So, if I were you, I would try a strategy that I would have a specific campaign for the pokemon products, a specific campaign for the best-performing non-pokemon products and a campaign for the rest of the products.

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Frequent changes especially budget/ tROAS value
In addition to all the information I wrote about above, they confirmed that performance fluctuation happened due to multiple changes that you've made in the campaign PMax: Real Smart Shopping.

- budget changes
$40/50 -> $20
During the period from 27/07 till 04/09 the budget was changed several times, after campaign activation from 17/09 till 23/09 the budget and target ROAS were changed several times as well.

- Auction activity and Conversion value fluctuations
On October 1, 2023, you increased the tROAS value from 600% to 1300%.
We recommend allowing for a discrepancy of up to 15% between the actual tROAS (target return on ad spend) and the target ROAS. To approach the target more closely, the system is reducing your bids to avoid participating in relatively expensive auctions, as this could lead to a deviation from the target. This is the primary reason why we expect traffic fluctuations to occur. Smart bidding is working to lower your bids for the actual ROAS in order to get closer to the average target ROAS.

- Budget changes (it increased on 27/08 and 2/09 decreased)
We are writing to inform you that we have reviewed your Google Ads again and noticed that you increased the budget at the end of August and then reduced it suddenly in the beginning of September. This is one of the reasons why you started seeing a drop in the traffic on the campaign. Because frequent changes can always affect the campaign performance, we believe this is one of the reasons why the traffic has been dropping since then. It is recommended to wait for at least a few weeks after making major changes in the campaign.

- Product status changes (Ready to serve products amount changed)
Regarding the change in the status of your products, as I can see, the campaign is in the retail sector and relies heavily on the Merchant Center feed. This means that a significant portion of its performance is attributed to the products themselves. If changes occurred in the products, they could impact the campaign's performance. When your products changed from a "Ready to serve" status, the system had fewer products available compared to before, and as a result, there was a noticeable drop in performance

- Top changed segments (Most performing products previously and with a different value changed its performance)
The contribution of the top segment has changed. Several of the top and popular products have altered their status. For example, products such as 'GX EX Collection: Pokemon Cards,' '60 MEGA,' 'Latest Pokemon Series Metal Cards,' 'Metal card-N,' and 'Halloween Gift Pokemon Cards TCG 324 Booster' and 'Pokemon Series GBA Game Cartridge' have seen changes in their status.
 Top  changed segments are the popular segments (items, listing groups) in the previous period that contributed the most to your overall campaign performance fluctuation in the given time period. You can see the list of these products on the explanation tab (navigate to the blue highlighted numbers under the conversion value column and scroll down to the "Top segments" section).

- Overlapping in these campaigns observed from 26/09 till 01/10. During this time you indeed paused one campaign and active another, but it may take some time for the system to apply these changes.
- In addition, I would like to inform you that for the bidding strategy optimization only Primary conversion action is used. Thus, Transactions (All Web Site Data) is Secondary and it's not considered for optimization.