Google Merchant Center is the free console in which retailers, brands and marketplaces hand Google a structured record of what they sell: identifiers, titles, prices, images, stock levels, shipping costs and return terms. Google does not sell keywords on its shopping surfaces. It assembles each Shopping ad, free listing and artificial intelligence (AI) shopping answer from those records, so it needs one place to receive them, check them against the merchant's own website and decide which are fit to show. Merchant Center is that place. An account holds no budget and buys nothing, yet without one a retailer has no products on Google to advertise.

How a catalogue enters the system

Setup begins with business details, a verified and claimed website, and shipping and return settings. Products then arrive through data sources, the name Google has used since 2024 for what were called feeds. Google's December 2024 glossary lists the routes: automatic import from the online store, direct connections with e-commerce platforms, file uploads in .txt, .xml or .tsv format, Google Sheets, individual entry and an application programming interface (API). Supplemental sources and attribute rules sit on top of a primary source, overriding or rewriting fields without replacing it.

Every item must conform to the product data specification. According to Google's Merchant Center Help documentation, seven attributes are required of all products: id (up to 50 characters, ideally the stock keeping unit, or SKU), title (up to 150 characters), description (up to 5,000), link, image_link, availability and price. Brand is required for new products outside media. A manufacturer-assigned Global Trade Item Number (GTIN) is expected where one exists, with a Manufacturer Part Number (MPN) as the fallback, and Google disapproves items carrying a wrong value. The rest depends on category and country.

A worked example shows how the obligations stack up. A German retailer listing a men's jacket must submit a price that includes value-added tax (VAT); only US and Canadian prices exclude tax. It must also supply a shipping cost, which Google requires in 21 countries, Germany among them. Because the jacket is apparel aimed at German shoppers, age_group, gender, color and size become mandatory, and each size or colour variant needs a shared item_group_id. Availability takes one of four values written in English (in_stock, out_of_stock, preorder or backorder) whatever the shop's language.

From record to auction

Google then crawls each landing page and compares it with the submitted data and any structured markup. Mismatched prices, unreachable pages and policy breaches produce item disapprovals, listed under the Needs attention tab that replaced Diagnostics. Problems can escalate to account level: running several accounts for the same country is treated as abuse of the ad network and can end in suspension.

Approved items flow to whichever marketing methods, formerly destinations, the merchant has enabled. Paid delivery requires a linked Google Ads account, in which Standard Shopping or Performance Max campaigns read the catalogue directly. Relevance is derived from titles, descriptions and attributes rather than keywords, which is why feed edits behave like bid changes. Five custom_label fields, each capped at 1,000 unique values across an account, exist to segment bidding, and the excluded_destination attribute can keep an item out of Shopping ads, free listings, local inventory ads or YouTube affiliate placements one by one. The id must also match the identifier fired by remarketing tags on the merchant's site, or dynamic remarketing fails.

Large catalogues are managed programmatically through the Merchant API, a modular redesign of the Content API for Shopping that recommends gRPC and also accepts REST. Products are addressed by resource name rather than numeric ID, as in accounts/123456/products/en~US~sku123, where the final segment joins content language, feed label and the merchant's own offer ID.

From Froogle to Merchant Center

Google's product search began as Froogle in December 2002, a free index built by crawling retailer pages, and was renamed Google Product Search in April 2007. Submissions went through Google Base, a general database for structured content launched in November 2005, until Merchant Center replaced it for products on September 28, 2009, according to contemporary trade coverage. On November 11, 2009 Google announced Product Listing Ads as a US beta built on that data.

The commercial turn came on May 31, 2012, when Google said Product Search would become Google Shopping and inclusion would be paid, making Merchant Center the gateway to advertising. Regulation reshaped it next. After the European Commission fined Google 2.42 billion euros on June 27, 2017 for favouring its own comparison shopping service, Google opened Shopping ads to rival comparison shopping services (CSSs), which submit merchants' products through their own Merchant Center accounts. Free distribution returned on April 21, 2020, when Bill Ready, then Google's president of commerce, wrote that the US Shopping tab would "consist primarily of free listings", with other markets following that year.

The current interface arrived as Merchant Center Next, unveiled at Google Marketing Live in May 2023 with automatic population of products from a merchant's website. Google made the upgrade compulsory and completed the global rollout in August 2024, renaming feeds and destinations and folding Diagnostics into Needs attention. The Merchant API reached general availability in August 2025, with August 18, 2026 set as the shutdown date for its predecessor, and the "Next" suffix was dropped in July 2026.

Why marketers watch it

Google's own figures put the Shopping Graph, the catalogue it builds largely from merchant submissions, at more than 60 billion listings with over 2 billion updated every hour, numbers a Google AI strategist recast in September 2026 as raw material for shopping agents. Google announced dozens of conversational attributes in January 2026, and eight carry documentation tying them to AI Mode or AI Overviews. AI performance insights, added on May 27, 2026, report share of voice and attribute completeness across AI Mode, AI Overviews and the Gemini app.

The account has also become harder to avoid. Google began linking Ads and Merchant Center accounts automatically from October 3, 2024, and agencies gained a portfolio layer, Merchant Center for Agencies, in which one administrator can link up to 1,000 client accounts.

Where it breaks and who objects

Freshness is the best-documented weakness. In January 2026 Emmanuel Flossie of the consultancy FeedArmy found that automatic import, which Merchant Center describes as refreshing every 24 hours, was serving product data nine to ten days old. The AI product import beta added on May 5, 2026 promises no refresh at all, performing a one-time scan of the website and assigning identifiers itself. A stale price wastes a click in an ad; on a surface that picks products for the shopper, it can decide which item is offered.

Control is a second weakness. In March 2026 a former agency that still held top-level access closed a client's account, wiping its product data along with links to Google Ads and Analytics. Numbers can move beneath merchants as well: from August 24, 2026 Google moved YouTube affiliate clicks out of organic traffic and restated history back to July 1, warning of a one-time drop of unspecified size. The line between paid and unpaid placement has thinned too, since sponsored tiles began appearing inside the Shopping tab's free listing grid in April 2026.

The competition dispute is older and still open. Rival comparison sites have argued since 2017 that the CSS remedy left Google's own unit advantaged; Google maintained that well-run sites could still rank prominently in organic results. On July 1, 2026 the Stockholm Patent and Market Court sided with the rivals, holding that the 2017 changes never ended the abuse and awarding Klarna Technologies, owner of PriceRunner, 950 million pounds in principal damages for the UK market.

Not the same as

Google Shopping. The consumer-facing surfaces, such as the Shopping tab and product results, on which Merchant Center data appears. One is the shop window, the other the stockroom.

Shopping ads and Performance Max. Campaigns bought in Google Ads. They hold the budgets and bids; Merchant Center supplies only the product records they draw on.

Manufacturer Center. A separate free Google tool reserved for brand owners and licensees, according to Google's documentation, used to enrich Google's catalogue with authoritative product details. It describes products rather than a particular seller's offer, and cannot place an item in an ad.

Microsoft Merchant Center. Microsoft Advertising's equivalent catalogue for Bing, Copilot and its own Performance Max campaigns, run entirely separately, with its own data sources and policies.

Recent developments

On September 17 and 18, free product listings and popular product carousels disappeared from Google Search across the European Economic Area (EEA), with Productrise, which sells visibility monitoring, recording drops of roughly 90 to 100 per cent in Germany, France, Belgium, Sweden and the Netherlands. Ginny Marvin, Google's Ads Liaison, confirmed that the removal followed from Digital Markets Act (DMA) requirements. The space passes to comparison services, leaving EEA merchants a choice of paid Shopping ads, a CSS margin or absence.

In the US the movement ran the other way. On September 22, Google told Shopify merchants that their stores had been matched to Merchant Center and native checkout switched on in AI Mode and Gemini, with eligible products included automatically and opting out left to the Shopify admin. Images below 500 by 500 pixels will be disapproved from January 31, 2027, according to Google's product data specification. Content API requests have returned progressive errors since September 1, 2026, according to Google's developer documentation, though merchants can still apply for extended access.

Timeline

  • December 2002: Google launches Froogle, a free product index built by crawling retailer pages
  • November 2005: Google Base launches as a database for structured submissions, including product data
  • April 18, 2007: Froogle is renamed Google Product Search
  • September 28, 2009: Google Merchant Center launches, replacing Google Base for product submissions
  • November 11, 2009: Google announces Product Listing Ads as a US beta
  • May 31, 2012: Google Product Search becomes Google Shopping and moves to paid inclusion
  • June 27, 2017: The European Commission fines Google 2.42 billion euros in the Google Shopping case
  • April 21, 2020: Google announces that the US Shopping tab will consist primarily of free listings
  • May 2023: Merchant Center Next is unveiled at Google Marketing Live
  • August 2024: The global rollout of Merchant Center Next completes
  • October 3, 2024: Google begins linking Google Ads and Merchant Center accounts automatically
  • December 23, 2024: Google publishes a glossary for Merchant Center Next
  • August 20, 2025: The Merchant API reaches general availability
  • January 11, 2026: Google announces dozens of conversational Merchant Center attributes
  • January 13, 2026: Automatic import is found running nine to ten days behind its stated 24-hour cycle
  • March 6, 2026: A former agency closes a client's Merchant Center account, wiping its data
  • March 11, 2026: Merchant Center for Agencies becomes generally available in the US and Canada
  • April 20, 2026: Sponsored tiles appear inside the Shopping tab's free listing grid
  • May 5, 2026: An AI product import beta appears in Merchant Center
  • May 17, 2026: Merchant Center for Agencies rolls out globally
  • May 27, 2026: Google adds AI performance insights to Merchant Center
  • July 1, 2026: The Stockholm Patent and Market Court awards Klarna Technologies 950 million pounds in principal damages for the UK market
  • July 2026: Google drops "Next" from the Merchant Center name
  • August 18, 2026: The Content API for Shopping is sunset
  • August 24, 2026: YouTube affiliate clicks are separated from organic traffic in Merchant Center reports, restated back to July 1
  • September 1, 2026: Content API requests begin returning progressive errors
  • September 17-18, 2026: Free product listings and popular product carousels disappear from Google Search in the EEA
  • September 22, 2026: Google notifies Shopify merchants that native checkout in AI Mode and Gemini has been enabled
  • January 31, 2027: Scheduled enforcement of the 500 by 500 pixel minimum for product images

Summary

Who. Google operates Merchant Center, the Merchant API and Merchant Center for Agencies. Retailers, brands and marketplaces supply the data; agencies, feed management vendors, e-commerce platforms such as Shopify and, in Europe, comparison shopping services manage it on their behalf. The European Commission and national courts have examined how Google uses it.

What. Google's free console for submitting, validating and maintaining product data, governed by a product data specification and Shopping policies, and feeding Shopping ads, Performance Max, free listings, YouTube affiliate placements, AI Mode and Gemini.

When. Launched on September 28, 2009 to replace Google Base for product submissions, made the gateway to paid Shopping in 2012, reopened to free listings in 2020, rebuilt as Merchant Center Next between 2023 and August 2024, and renamed plain Google Merchant Center in July 2026.

Where. At merchants.google.com and through the Merchant API, with its data surfacing on Google Search, the Shopping tab, YouTube, Gemini and, outside the EEA, free product listings.

Why. Google's shopping formats are built from structured product records rather than keywords, so Google needs a single, policed intake for those records. That role gives Merchant Center outsized influence over which products appear, which is why feed freshness, account control and Google's treatment of rival comparison services remain contested.