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Merchant Center Feed GTIN Issue

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# 1
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I have been using a Merchant Center feed for over a year to run Google Shopping ads in AdWords. Recently we have built out a new feed that will enable us to use Google Product Ratings which associates customer review data to our products and then can display star ratings and review counts within the PLA ad.

 

However, this association requires that I add a GTIN value for each of the products in the feed I've been running for a while. I did try doing this briefly and noticed that our ads disappeared from Google Shopping. After I overwrote the new feed with the old one that does not contain GTIN values, the PLAs were displaying normally again.

 

I know that changing the product ID values in a feed can mess up the Google Shopping algo and reset and progress made with particular products. But I was not aware that associating products with a GTIN value also did this.

 

Is this the case? Does adding a GTIN value to a product that historically was not using one reset the information gathered during advertising? If so, is there a solution to ensuring the products are associated with the review data as well as not having to start optimizing a product from scratch?

1 Expert replyverified_user
1 ACCEPTED SOLUTION

Accepted Solutions
Marked as Best Answer.
Solution
Accepted by topic author Craig G
February

Merchant Center Feed GTIN Issue

[ Edited ]
Top Contributor
# 2
Top Contributor

any major change to an item may trigger a re-review/reset of quality

related signals -- certainly id, and especially global-trade-data, since

these are both considered new or different physical items altogether.

 

id tends to be the more impactful of the two,

since overall history and quality are effected.

as to global-trade-data --

global-trade-data (gtin, brand, mpn) are mainly legal designations
that are assigned by manufacturers to exact, specific, item-offers.

global-trade-data cannot be self-assigned or assigned at whim by merchants --
these both are policy violations and grounds for disapproval or a suspension
from the program, at any time.

if a specific item-offer has been assigned proper global-trade-data by the

manufacturer and is being sold by multiple merchants, then google requires

that the proper, exact, and identical, global-trade-data (gtin, brand, mpn)

be submitted by all merchants selling that specific item-offer.

if a specific item-offer has not been assigned proper global-trade-data by the

manufacturer then google requires identifier_exists be submitted with a value

of no and gtin, brand, and mpn cannot be submitted, at all.

the requirements for global-trade-data are true regardless
of any other google-program -- such as product-ratings.

as to product-ratings and global-trade-data --

product-ratings require 3 or more reviews per product --
from any source that google allows, including merchants,
3rd-party review-aggregators, editorial-sites, and consumers.

for a merchant to be eligible to upload product-reviews for their inventory,
requires a minimum of 50-reviews across all of the inventory items submitted;
only currently in-stock, inventory items, should ever be submitted.

generally, accurate global-trade-data is required, from the manufacturer,
submitted by the merchant, for google to match the product-rating to the
submitted item-offer -- accurate gtin, and brand are critical.

otherwise, without global-trade-data, google will attempt to match
the item-offer via the id within the product-feed and sku within the
product-ratings-feed, and other attributes such as landing-page url.

product-ratings are also restricted by target-country.

google may take up to eight-weeks before product-ratings begin to show.

otherwise, product-ratings show purely at google's discretion based
on the search-terms used, relevance, and other factors -- currently,
there is no way for merchants to force product-reviews to show.

of course, matching the item-offer using global-trade-data tends
to be more accurate and allows google to show product-ratings
more often, more accurately, or within a shorter time period --
there is no way to force the matching and submitting improper
or invalid global-trade-data can trigger a policy violation, or
cause items to be removed from the auctions, at any time.

otherwise, for google-product-ratings issues, google may be contacted directly:
https://support.google.com/merchants/contact/product_ratings

 

View solution in original post

Marked as Best Answer.
Solution
Accepted by topic author Craig G
February

Merchant Center Feed GTIN Issue

[ Edited ]
Top Contributor
# 2
Top Contributor

any major change to an item may trigger a re-review/reset of quality

related signals -- certainly id, and especially global-trade-data, since

these are both considered new or different physical items altogether.

 

id tends to be the more impactful of the two,

since overall history and quality are effected.

as to global-trade-data --

global-trade-data (gtin, brand, mpn) are mainly legal designations
that are assigned by manufacturers to exact, specific, item-offers.

global-trade-data cannot be self-assigned or assigned at whim by merchants --
these both are policy violations and grounds for disapproval or a suspension
from the program, at any time.

if a specific item-offer has been assigned proper global-trade-data by the

manufacturer and is being sold by multiple merchants, then google requires

that the proper, exact, and identical, global-trade-data (gtin, brand, mpn)

be submitted by all merchants selling that specific item-offer.

if a specific item-offer has not been assigned proper global-trade-data by the

manufacturer then google requires identifier_exists be submitted with a value

of no and gtin, brand, and mpn cannot be submitted, at all.

the requirements for global-trade-data are true regardless
of any other google-program -- such as product-ratings.

as to product-ratings and global-trade-data --

product-ratings require 3 or more reviews per product --
from any source that google allows, including merchants,
3rd-party review-aggregators, editorial-sites, and consumers.

for a merchant to be eligible to upload product-reviews for their inventory,
requires a minimum of 50-reviews across all of the inventory items submitted;
only currently in-stock, inventory items, should ever be submitted.

generally, accurate global-trade-data is required, from the manufacturer,
submitted by the merchant, for google to match the product-rating to the
submitted item-offer -- accurate gtin, and brand are critical.

otherwise, without global-trade-data, google will attempt to match
the item-offer via the id within the product-feed and sku within the
product-ratings-feed, and other attributes such as landing-page url.

product-ratings are also restricted by target-country.

google may take up to eight-weeks before product-ratings begin to show.

otherwise, product-ratings show purely at google's discretion based
on the search-terms used, relevance, and other factors -- currently,
there is no way for merchants to force product-reviews to show.

of course, matching the item-offer using global-trade-data tends
to be more accurate and allows google to show product-ratings
more often, more accurately, or within a shorter time period --
there is no way to force the matching and submitting improper
or invalid global-trade-data can trigger a policy violation, or
cause items to be removed from the auctions, at any time.

otherwise, for google-product-ratings issues, google may be contacted directly:
https://support.google.com/merchants/contact/product_ratings

 

Merchant Center Feed GTIN Issue

Follower ✭ ☆ ☆
# 3
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Thank you very much for your thorough response.

 

I just want to clarify that we are in no way self assigning or assigning GTIN data in any way. We are the manufacturers and we have recently created UPCs for certain products.

 

So with all of this in mind, other attributes can be used besides GTIN to match the product with the reviews? 

 

Thanks again

 

 

Merchant Center Feed GTIN Issue

[ Edited ]
Top Contributor
# 4
Top Contributor

 

first, you're welcome.


the short answer is yes.

google never requires a merchant to purchase any global-trade-data,
(gtin) whatsoever -- even if the merchant is also the manufacturer.

generally, a merchant who is also the manufacturer should not suddenly
submit their own purchased global-trade-data unless the gtin is valid,
assigned by gs1, the specific item-offer is currently being sold by
multiple merchants, at least one other merchant is also submitting
shopping-ad listings, and all merchants, including the manufacturer,
are all submitting and using identical global-trade-data.

the gs1 bar-code/digits should be stamped on the product, at the factory.


regardless, what was posted in terms of product-ratings and shopping-ads
still holds -- if global-trade-data is not being submitted, then yes, google
will attempt to match id, sku, landing-page url's, and other attributes; but
the product-item matching is not as robust, nor as quick, nor as accurate,
as compared to when google uses global-trade-data.

submitting global-trade-data, when not submitted before, or is not currently
being submitted by multiple merchants, may trigger items to be reevaluated
in terms of policies, quality, and related factors, for the (new) item-offer --

the item should likely be submitted with a new id; especially if the upc/gtin

has been newly stamped on the product, at the factory, as is typical, and

especially if the newly-stamped offer is being sold by multiple merchants.

 

 

Merchant Center Feed GTIN Issue

Follower ✭ ☆ ☆
# 5
Follower ✭ ☆ ☆

Excellent thank you