Guides

How this actually works

Written from Google’s own documentation and each platform’s own help centre, quoted where it matters. Where the documentation says something inconvenient — that the category attribute is optional, that an override only applies in specific cases, that three review platforms have no export at all — these guides say so.

Straight answers

One question from each guide, answered here. The guide behind each one goes further.

Is google_product_category required?

No. Google lists it as optional and assigns a category automatically when you leave it out. The one exception in the documentation is a product using the subscription_cost attribute, which must have a category present. Submitting an invalid value, however, can prevent products from appearing — so if you fill it in, use an exact taxonomy value.

How to find the right Google product category (with ID)

Can I put the same value in both attributes?

You can — a Google taxonomy path is a valid product_type string. But it wastes the attribute. product_type exists so you can report and bid on your own segments, and duplicating Google's tree into it gives you two copies of the same view.

Google product category vs product_type: what's the difference

Will a supplemental feed always override the category Google assigned?

No, and no honest guide can promise that. Google documents the attribute as overriding automatic categorisation in specific cases — category-specific attribute requirements, Google Ads targeting, and alcohol — and does not state that a submitted value always takes precedence.

How to override Google's automatic product category with a supplemental feed

Can I set the Google product category for all products at once?

If every product genuinely belongs in one category, a fixed-value attribute rule in Google for WooCommerce is the cleanest way — assuming the category is available as a target attribute, which merchants have reported it may not be. Otherwise the CSV round-trip is the route, and it is what WooCommerce support recommends.

How to bulk-assign Google product categories in WooCommerce

Does Shopify send my Shopify product category to Google as the Google category?

Not according to any Shopify documentation we could find for the Google & YouTube channel. Shopify does document auto-filling the Google product category for the Meta channel, which makes the absence of an equivalent statement for Google worth taking seriously. Treat the Google column as yours to fill.

Shopify product category vs Google product category: how they relate to your feeds

Is google_product_category required for gift cards?

The attribute stays optional, but if you submit a gift card with a category it must be 53, Gift Cards & Certificates.

Products that must use a specific Google product category

Will a product be disapproved if it has no google_product_category?

Google’s documentation says that when the attribute is not provided, Google uses internal signals to determine the category. Missing is not the error — an invalid value is.

How to fix an invalid product category in Merchant Center

Should google_product_category be the ID or the path?

Either is accepted, but Google’s product data specification recommends the category ID. Send one or the other, not both.

Google product category: use the ID or the full path?

Can I export Amazon reviews?

No. Amazon answered this directly on the Seller Central forums: downloading customer reviews is not an option, and the suggested alternatives are Voice of the Customer and Seller Feedback. The Customer Reviews tool itself was deprecated at the end of September 2025 and folded into Voice of the Customer.

How to export product reviews

How many reviews do I need before this is worth doing?

Around fifty is where reading them all stops being the faster option. Below that the preparation costs more than the reading. Above a few hundred, sampling starts actively misleading you about what is common.

How to analyze thousands of customer reviews without reading them all

How do I decide which negative reviews to deal with first?

Take anything describing harm, lost money, a safety issue or a data issue first. Then rank topics by how many negative or mixed reviews they have, and fix from the top.

How to prioritise negative reviews by severity

Can I export App Store reviews without writing code?

Not through App Store Connect — it has no export for reviews, and Sales and Trends has no review report. Without code, the practical route is filtering the reviews page to what you care about and pasting those in, which is free up to thirty at a time.

App store review analysis for indie developers

Can I export Steam reviews to CSV?

Not with a button. Steamworks has no review download. Request the public appreviews endpoint page by page, up to 100 reviews at a time, and write the fields you need to a CSV yourself.

Steam review analysis for game developers

Is a product feed the same as a sitemap?

No. A sitemap lists URLs so a search engine can crawl them. A product feed lists products and their attributes, such as price, availability and category, so a shopping channel can build listings from them.

What is a product feed? The file behind every Shopping listing

Is product categorization the same as product classification?

In ecommerce the two words are used interchangeably. When people do draw a line, classification usually means assigning a product to an outside standard such as Google’s taxonomy, while categorization also covers the groupings you invent for your own store.

What is product categorization? The three category systems every store runs

Can Merchant Center do feed rules without a third-party tool?

Yes. Feed rules are now called attribute rules and are built into Merchant Center. Turn on the Advanced data source management add-on, then open the data source and its attribute rules tab.

What is product feed management, and when does a spreadsheet stop being enough?

Is review analysis the same as sentiment analysis?

Sentiment analysis is one part of it: whether a review is positive or negative. Review analysis also asks what the review is about, how serious the problem is and whether it needs a reply, which is what makes the result something you can act on.

What is customer review analysis? What it finds that star ratings hide

Are Google product ratings and store ratings the same thing?

No. Product ratings are stars for an individual product. Store ratings are stars for the business as a whole, drawn from different sources and shown under a different program with its own thresholds.

Product ratings vs store ratings on Google: what is the difference?

Why are most product reviews five stars?

Because reviewers are self-selected. Buyers already expected to like the product, and among them the delighted are far more likely to write than those who found it merely fine. Researchers call the result a J-shaped distribution.

Who actually writes product reviews, and why it skews your average

Does Meta use the Google product taxonomy?

Yes. Meta’s catalog field google_product_category is defined against Google’s product taxonomy, and its documentation links to Google’s taxonomy file. The field is optional.

Who uses the Google product taxonomy? Google, Meta, Microsoft and your feed tools

Who should be responsible for monitoring customer reviews?

One person should own the process of collecting, labelling and sending out reviews, so it actually happens. Several people should read the results, because the fixes belong to product, support, operations and marketing.

Who in your business should read customer reviews, and what each role looks for

Should the business owner respond to negative reviews?

In a small business it often works well, because the owner can promise changes. The risk is time and temper. Many shops have a support lead write the replies and bring in the owner only for high-severity cases.

Who should reply to a negative review: the owner, support, or whoever can fix it?

Do I need Google Ads to use Merchant Center?

No. Free listings run from Merchant Center alone and are on by default in most cases. Google Ads is only needed if you want to pay for Shopping or Performance Max ads.

Who needs Google Merchant Center, and who can skip it for now?

Is there a CSV of Google product categories?

Google publishes the list as a text file and an .xls spreadsheet, not as a CSV. Open the .xls if you want columns, or take the free CSV on the SellerSort taxonomy download page, converted from Google’s file with one column per level. If you convert the text file yourself, split each line on the first space-hyphen-space, because many category names contain commas and some contain hyphens.

Where to get the Google product category list: files, formats and languages

Can I target Shopping ads by Google product category?

Yes. In a Shopping campaign you can subdivide product groups by category and bid on each group. Performance Max listing groups can also use category, but only in the twelve countries Google lists.

Where the Google product category shows up in Google Ads

Should I set the Google product category in Shopify or in Merchant Center?

Set it where your feed is built. If the app that sends your feed to Google reads the Google category from Shopify, keep it there. If you cannot edit the store, use a Merchant Center supplemental data source. Avoid doing both.

Where should your Google product categories live: store, feed app or supplemental feed?

What are the main sources of customer feedback for an online store?

Product reviews, support tickets and emails, return and refund reasons, questions asked before buying, post-purchase surveys, and marketplace reports such as Amazon’s Voice of the Customer.

Where to find customer feedback beyond reviews: tickets, returns and questions

Is it legal to scrape competitor reviews?

That depends on the site and where you are, and this is not legal advice. Many sites prohibit scraping in their terms; Amazon does. Reading and copying a small sample by hand avoids the question and usually gives better insight.

Where to find competitor reviews worth reading, without scraping

When was the Google product taxonomy last updated?

The published file carries the version date 2021-09-21 on its first line. When we downloaded it on 19 September 2026, that date had not changed.

When does Google update its product taxonomy? What the version date tells you

How often should I review my Google product categories?

Check when something changes rather than on a fixed schedule: new products, a changed product, a Merchant Center issue, a new country, a platform or app change, new campaigns by category, or a new taxonomy version.

When to recheck your Google product categories: seven moments that matter

How quickly should you respond to a negative review?

Once you know what happened and what you can offer. For most complaints, a working day or two is a sound rule. Reviews alleging injury, fraud or legal action should be escalated before anyone replies.

When to respond to a negative review, and which ones should wait

How often should you analyse customer reviews?

Once a month on a fixed day for most stores, widening to a quarter if a month brings only a handful of reviews. Add an extra run after launches, product changes, rating drops, and your busiest season.

When to analyze customer reviews: a monthly habit and five extra moments

What is the best time to ask a customer for a review?

After they have used the product long enough to judge it: a few days after delivery for simple products, and two to four weeks for products that take time to show results, such as skincare or a mattress.

When to ask customers for a review, and the rules on how to ask

Why are my products approved but not showing on Google Shopping?

Approval makes a product eligible, not guaranteed. Google says free listings do not guarantee your products will be shown, because it relies on your data to match products to searches. Improve titles, identifiers and categories.

Why are my products not showing on Google Shopping? A diagnosis in order

What if my product does not fit any Google product category?

Use the deepest category that is still true, even if it is broad, and describe the product precisely in product_type. If even the top level is uncertain, leave the category empty and Google will assign one.

No Google product category fits your product? What to do instead

What are the most common reasons for negative reviews?

Products that are not as described, quality problems or defects, fit or compatibility issues, delivery problems, poor service, and poor value for the price. Which one leads depends on the store, so count your own.

Why customers leave negative reviews, and where each fix lives

Why did my product rating drop suddenly?

Check whether the product has few reviews, where one bad review moves the average a lot. If not, find the date the drop started and look for what changed just before it: supplier, packaging, carrier, listing, or how you ask for reviews.

Why did my product rating drop? Four causes and how to tell them apart

Why is sentiment analysis inaccurate for product reviews?

A single score cannot hold a review that praises one thing and criticises another. Sarcasm, product words such as “sucks” for a vacuum, comparisons and complaints about delivery also push scores the wrong way.

Why sentiment scores get reviews wrong, and what to ask instead

Do I need to categorise every product for Google Shopping?

No. The category is optional for most products and Google assigns one automatically. It matters most for products Google restricts to particular categories, products with invalid values, and products you advertise.

Which products to categorize first when the catalog is too big to do at once

Does Google Merchant Center accept CSV files?

Google’s file page lists tab-delimited text (.txt or .tsv) and XML. Save your spreadsheet as tab-delimited text rather than relying on commas, since many product titles and category names contain them.

Which product feed format should you use for Google Merchant Center?

Which customer reviews should I focus on?

It depends on the decision. For safety, any review describing harm. For product fixes, negative and mixed reviews on the most common topic. For replies, the ones still waiting. For your product page, specific five-star and three-star reviews.

Which customer reviews matter most? It depends on the decision

What is the difference between NPS and CSAT?

NPS asks whether a customer would recommend you, which measures the overall relationship. CSAT asks whether they were satisfied with a specific interaction, such as a support ticket or a delivery.

Which customer feedback metric to track: star ratings, CSAT, effort score or NPS?

Can I assign two Google product categories to one product?

No. Google’s attribute page says to include only one category. Choose the one that describes what the product is first, and use product_type or custom labels for the other angle.

Your product fits two Google categories: which one to choose

Who is responsible for the product feed in an ecommerce business?

One named person should be accountable for the feed as a whole, usually whoever runs the online store. Catalog, pricing, advertising and technical staff each supply parts of it.

Whose job is the product feed? Owning it when five people touch it

Where do the star ratings on Google Shopping come from?

Google says product ratings come from merchants, review aggregators, review sites and Google users. It matches reviews to products using data such as GTINs, MPNs and brand names.

Whose reviews show on your Google Shopping listing? Not always yours

Should I blame the courier in a reply to a negative review?

Usually not. The customer bought from you, not the courier, so blaming the courier in public tends to read as an excuse. Acknowledge the problem, say what you are doing about it, and deal with the courier privately.

Whose fault is a negative review? Ask who can fix the cause instead

Do customer reviews contain personal data?

Often. Review exports can include names, email addresses, order numbers and photo links, and the review text itself sometimes contains order numbers, phone numbers or addresses.

Whose data is in your reviews? What to strip before you analyze them

What is the difference between GTIN, MPN and SKU?

The GTIN is the manufacturer’s barcode number and the MPN is the manufacturer’s part number; both belong to the manufacturer. The SKU is the seller’s own stock code, which usually becomes the id in a Google feed.

GTIN, MPN and SKU: whose number is each, and who may create it

How do I appeal a disapproved product in Google Merchant Center?

Open the Needs attention tab, choose Fix in the Status column, pick Request website check or I disagree with the issue, and select Request review. Google says reviews can take up to 7 business days.

Who to contact when Merchant Center disapproves your products

How long should a Google Shopping product title be?

Up to 150 characters are allowed, but shoppers often see only the first 70 or fewer. Put what the product is and its most important details in the first 70, and use the rest for secondary details.

Who are product titles written for? Writing for shoppers and for search

Who reads replies to customer reviews?

The reviewer, and every later shopper who reads the review before buying. The second group is usually larger, so a good reply shows them how your business handles a problem.

Who is a review reply for? The reviewer, and every shopper after them

Who should I contact about a product defect customers mention in reviews?

The manufacturer or supplier if you sell your own brand, or the brand owner or distributor if you resell. Packaging and delivery damage goes to your packaging supplier or warehouse instead.

To whom do you take a product complaint from your reviews? Usually the supplier

Should I hire a freelancer or an agency for my product feed?

It depends on the problem. A freelance feed specialist suits data clean-up and disapprovals; an agency suits ongoing Shopping campaign management; a developer suits sync problems and custom platforms.

Who to hire for product feed help: developer, feed specialist or agency?

How long does a misrepresentation review take?

Google’s policy page says account reviews typically take 7 business days, and may take longer for complex reviews.

Google Merchant Center misrepresentation: what it covers and how to fix it

Is product_category required in the ChatGPT product feed?

No. It is optional in OpenAI’s spec. The nine required fields are item_id, title, description, url, brand, seller_name, image_url, availability and price.

ChatGPT product feed: OpenAI’s spec and where the category goes

What namespace does a Google Shopping XML feed use?

xmlns:g="http://base.google.com/ns/1.0", declared on the rss element. Every product attribute then carries the g: prefix, for example <g:price>.

Google Shopping XML feed example, with every required field

Are conversational attributes required in Merchant Center?

No. Google calls them completely optional and says including them does not change the approval status of existing products.

Merchant Center conversational attributes: the six fields for AI Mode

What is the Universal Commerce Protocol?

An open standard that Google uses for purchases on its AI surfaces, AI Mode in Search and the Gemini app. Merchants either handle the full checkout on Google or receive the shopper’s cart and finish the sale on their own site.

Universal Commerce Protocol (UCP): what Merchant Center needs for checkout

What is the difference between ACP and UCP?

ACP is OpenAI’s protocol for selling to shoppers in ChatGPT, fed by a product feed sent to OpenAI. UCP is Google’s protocol for purchases on AI Mode in Search and the Gemini app, built on the product data in Merchant Center.

ACP vs UCP: OpenAI’s and Google’s agentic commerce protocols compared

When does the Content API for Shopping stop working?

It was sunset on August 18, 2026. Since September 1, 2026, requests without an extension fail intermittently with HTTP 410, and Google plans to shut it down completely in early 2027, a date it says may be revised.

Content API for Shopping sunset: the dates, the 410 errors and what to do

What is Google Business Agent?

A chat on Google Search that answers shoppers’ product questions in a brand’s voice. Shoppers open it with an Ask button when they search for the brand, and it answers from the brand’s Merchant Center data and website.

Google Business Agent: the brand chat on Search, and how to set it up

What product data does Google AI Mode use?

Google’s AI surfaces build on the product data in Merchant Center. Google also offers optional conversational attributes, such as questions and answers and variant options, that it says help AI-driven surfaces like AI Mode understand products.

Which product data AI shopping assistants read: AI Mode, Gemini, ChatGPT

Google product categories

What the google_product_category attribute is, how Google treats the value you send, and how to assign it across a catalog rather than one product at a time.

Customer reviews

Getting the reviews out of a platform that may not want to give them to you, and turning them into counts — which complaint is common rather than merely loud.