Seller ratings are star scores, out of five, that describe what it is like to buy from an online store rather than what a product is like. Google attaches them to Search text ads, Shopping ads and unpaid results so that a shopper choosing between unfamiliar retailers has some evidence about delivery, service and returns before clicking. A search ad on its own says nothing about whether the merchant behind it is reliable. Google's documentation now calls the feature store ratings, though "seller ratings" remains the name most advertisers and review vendors use.

Marketplaces such as eBay and Amazon run seller feedback systems of their own, and Microsoft Advertising offers a comparable ad feature called merchant ratings. This explainer leads with the Google sense, which carries direct consequences for paid search.

How a store rating is assembled

According to Google's Merchant Center help page, a store rating draws on three inputs. The first is Google Customer Reviews, a free programme in Merchant Center that invites shoppers at checkout to opt in to a survey sent after their order should have arrived. The second is reviews of the store's domain, from approved third-party partners and from Google Search users. The third is aggregated metrics from shopping research Google runs itself.

As of October 2026 Google names 29 review partners, among them Trustpilot, Yotpo, Feefo, Bazaarvoice and Trusted Shops, and says it adds only one or two a year. Google weights the inputs using "internal logic" it does not disclose, filters out reviews it judges to be spam or not tied to a completed transaction, and adds new reviews with a delay.

Eligibility rests on four conditions. A store generally needs at least 100 eligible, unique, post-purchase reviews, though Google says the number can vary. Ratings are calculated per country, and a review counts only in the shopper's own country, so a retailer selling into Germany and France holds two separate ratings. Paid placements require an average of at least 3.5 out of 5; unpaid surfaces carry no stated floor. For text ads, the domain in the visible URL must match the domain the reviews belong to.

The time window is less settled. Google's Ads help page and part of the Merchant Center page refer to the last 24 months, while another section of the Merchant Center page says "last 5 years". The 24-month figure is the one practitioners work from. Merchants can check a score at google.com/storepages, adding a country code; the page may not load if the thresholds are not met.

Where the stars appear and what they cost

In Google Ads, store ratings are an automated asset, the category Google renamed from automated extensions in September 2022. Advertisers do not create them. A qualifying store's rating can appear under a Search text ad as a score, a review count, an optional qualifier such as average delivery time and, in most markets, a link to reviews. The asset can be turned off only through account-level automated asset settings. Clicks are charged as usual, and no Merchant Center account is needed for text ads.

Ratings also appear on Shopping ads, under the same 3.5 floor, on free product listings, in rich results for searches on the merchant's name, and in a store insights panel drawing on Google's Store Quality scorecard for shipping, returns, pricing and payment options. Qualifying does not guarantee display: Google says the asset depends on auction dynamics and may be hidden when feedback is unrelated to what an ad promotes. A December 2021 Search Engine Journal column by Pauline Jakober estimated from her own accounts that eligible ratings showed "about one-third of the time".

From Product Search stars to store ratings

Google introduced the format on June 28, 2010, when Dan Friedman of the Inside AdWords team announced seller rating extensions for English-language searches on Google.com. Ratings came from Google Product Search, which aggregated reviews from across the web, and a store needed four stars or more from at least 30 reviews. A 2011 Google post, cited by PPC Hero, put the click-through gain at "as much as" 17 per cent.

The rules have since moved towards fresher and more local data. In September 2012 Google limited the count to reviews from the previous 12 months. In August 2016, as reported by Reviews.co.uk and Search Engine Land, the minimum rose from 30 to 150 reviews within 12 months, with the star floor by then at 3.5; when it fell from four is not documented. In late 2018 Google split ratings by country, replacing the worldwide 150-review test with 100 reviews per country, according to Ginny Marvin's November 2018 report for Search Engine Land. The window later widened to 24 months, on an undocumented date.

Collection changed in parallel. Google Trusted Stores, launched on June 7, 2012 with purchase protection of up to $1,000, was replaced in April 2017 by Google Customer Reviews, which kept only the ratings component, according to Marketing Land. Separate review extensions, which quoted third-party publications, were sunset after an announcement on January 12, 2018. The Trusted Store badge became Top Quality Store in 2023, and by December 2024 Google's help pages had moved to "store ratings" without a formal announcement.

Why the stars matter to advertisers

The stars sit in the most contested part of a results page and are one of the few ad elements a bigger budget cannot buy. Google's current figure is modest: an average 2 per cent click-through rate lift on Search text ads, from internal data. That compares with 17 per cent in 2011 and the figures around 10 per cent that, according to PPC Land's coverage of Google Customer Reviews on Shopify, appeared in older Google documentation. Google does not say whether the decline reflects saturation, crowded ad layouts or a new method.

The rating feeds surfaces beyond the ad. In October 2024, store ratings in Google Search, with shop insights on delivery, returns, pricing and payments, expanded from the US to Australia, Canada, India and the UK. In September 2025 Google released a store widget that shows the rating on merchants' own sites, claiming up to 8 per cent higher sales within 90 days, without a published method.

For small retailers the thresholds are the main issue: a store with 99 recent reviews in a country shows no stars, while a rival with 100 does. Link Walls, an analyst quoted by Multichannel Merchant in 2016, said the 150-review rule would cost smaller sellers the display.

Limitations and disputes

The scoring is opaque. Google does not publish source weights, the exact review count it applies to a given store, or how it calibrates ratings across partners. Merchants cannot reply to individual reviews in Merchant Center, and Google does not display merchant responses, a point Emmanuel Flossie of the consultancy FeedArmy raised when recommending third-party platforms over Google Customer Reviews.

Collection is fragile. Shopify blocked apps from adding scripts to Thank You and Order Status pages from February 1, 2025, with an August 28, 2025 deadline for Shopify Plus, breaking the pop-up through which Google Customer Reviews gathered opt-ins until an inline block in the Google and YouTube app replaced it. In February 2025 PPC News Feed also reported that Google had removed the link from the "Rating" label in the Czech Republic.

Trust in the underlying reviews is the larger dispute. Volume thresholds create pressure to solicit reviews, a risk the German law firm WBS flagged in October 2012. Regulators have since acted. The US Federal Trade Commission's fake reviews rule took effect on October 21, 2024. On January 27, 2025 the UK Competition and Markets Authority secured undertakings from Google to delete reviews by repeat offenders and flag businesses inflating ratings, and the Digital Markets, Competition and Consumers Act 2024 banned commissioning fake reviews from April 2025. Google Customer Reviews is tied to a purchase, which, as PPC Land's verified purchase explainer notes, sets it apart from Business Profile review links with no purchase check. Partner reviews depend on each partner's controls.

Seller ratings versus adjacent terms

Product ratings score an individual item, not the store, and appear on Shopping ads from a separate feed; Google rolled them out globally in December 2017. A single Shopping ad can carry both.

Top Quality Store is a badge, not a star score. It is awarded from Store Quality metrics such as shipping speed, shipping cost, return cost and return window, and since December 2024 has been available to display on merchant websites in beta.

Google Business Profile reviews rate a business in Maps and local results. They describe a location and its service, and are not filtered for proof of purchase in the same way.

Marketplace seller feedback rates a third-party seller inside one platform. eBay introduced Detailed Seller Ratings in 2007, and Amazon switched to star-only seller feedback in 2025. Neither feeds Google's store ratings.

Recent developments

Google added an explicit requirements section to its Merchant Center store ratings page in September 2026, setting out the 100-review, 3.5-star, 24-month and per-country rules together. Hana Kobzová of PPC News Feed spotted it on September 18; Barry Schwartz of Search Engine Roundtable, comparing an archived copy from July 15, found the rest of the page mostly rearranged.

The surfaces are shifting. On September 17 and 18, 2026, free product listings disappeared from Google Search across the European Economic Area, removing in that region one placement where Google lists store ratings. Google's July 2026 guideline on undisclosed incentivised reviews covers review markup on merchants' own pages rather than store ratings, but points the same way: stars earned through hidden incentives are treated as a policy breach.

Timeline

  • 2007 - eBay introduces Detailed Seller Ratings, rating sellers on four criteria from one to five.
  • June 28, 2010 - Google launches seller rating extensions on Google.com: four stars or more, at least 30 reviews, sourced from Google Product Search.
  • 2011 - A Google Inside AdWords post cites a click-through gain of up to 17 per cent for ads showing seller ratings.
  • June 7, 2012 - Google launches Trusted Stores with purchase protection of up to $1,000.
  • September 2012 - Seller ratings limited to reviews from the previous 12 months.
  • August 2016 - Minimum rises from 30 to 150 reviews in 12 months; 3.5-star floor in place.
  • March 10, 2017 - Google's India blog introduces seller ratings on Search ads, fed by Google Customer Reviews.
  • April 2017 - Google Customer Reviews replaces Trusted Stores.
  • January 12, 2018 - Google announces the sunset of review extensions.
  • Late 2018 - Ratings split by country; threshold becomes 100 reviews per country (reported November 2018).
  • September 2022 - Google renames ad extensions as assets; seller ratings become an automated asset.
  • 2023 - Trusted Store badge renamed Top Quality Store.
  • October 9, 2024 - Store ratings in Google Search expand from the US to Australia, Canada, India and the UK.
  • October 21, 2024 - FTC rule banning fake reviews takes effect.
  • December 2024 - Google's documentation uses "store ratings" in place of "seller ratings"; Top Quality Store badge beta for merchant websites expands.
  • January 27, 2025 - UK CMA secures fake review undertakings from Google.
  • February 2025 - Link removed from the "Rating" label in some countries, including the Czech Republic.
  • April 2025 - UK ban on fake reviews under the DMCC Act 2024 takes effect.
  • August 28, 2025 - Shopify Plus deadline that breaks the Google Customer Reviews checkout pop-up.
  • September 18, 2025 - Google launches the store widget for merchant websites.
  • September 2026 - Google publishes a requirements section for store ratings in Merchant Center help.
  • September 17-18, 2026 - Free product listings removed from Google Search in the EEA.

Summary

Who: Google operates seller ratings, now called store ratings, in Google Ads and Merchant Center. Ratings come from shoppers through Google Customer Reviews, 29 approved review partners such as Trustpilot and Yotpo, Google Search users and Google's own research. Retailers and the agencies running their Search and Shopping campaigns are the parties affected.

What: A five-star score describing the experience of buying from an online store, shown as an automated asset on text and Shopping ads and on unpaid listings, distinct from ratings of individual products.

When: Launched on June 28, 2010 as seller rating extensions, with thresholds tightened in 2012, 2016 and 2018; renamed store ratings in Google's documentation by December 2024; requirements restated in September 2026.

Where: Google Search, the Shopping tab, YouTube and merchant websites through the store widget, calculated separately for each country. Free listings, one display surface, were removed in the EEA in September 2026.

Why: Search ads give no evidence of a merchant's reliability. The stars supply that evidence from recent post-purchase reviews, with Google reporting an average 2 per cent click-through lift on text ads, while raising open questions about opaque weighting, volume thresholds that disadvantage small stores and the integrity of the reviews behind the score.