Amazon Attribution is a free measurement product from Amazon Ads that tells brands what happens on Amazon after a shopper clicks an ad bought somewhere else. A brand running Google search ads, Meta social ads, email newsletters or influencer posts that link to an Amazon product page cannot see, from those platforms, whether the click turned into a detail page view, an add-to-cart or a purchase. Amazon holds that data. Attribution exists to hand a slice of it back, in exchange for routing marketing traffic into the Amazon store.

Amazon's own formats, such as Sponsored Products and its demand-side platform (DSP), report conversions natively. Attribution covers everything else - what Amazon calls "non-Amazon media" - making Amazon the conversion record for a brand's external marketing, at least for sales on Amazon.

How the measurement works

The mechanism is a tagged link. According to Amazon's basics guide, "Amazon Attribution ad traffic measurement is powered by attribution tags", placed "directly in your non-Amazon ad's final destination URL." The setup follows the hierarchy of an ad account:

  1. An advertiser creates an Attribution order and selects the products to promote, identified by ASIN (Amazon Standard Identification Number).
  2. Inside the order sit ad groups, usually mapped to a publisher and channel, such as Google search or a Facebook campaign. Amazon's guide states that "each ad group generates a unique Amazon Attribution tag."
  3. The tag, a URL pointing at the Amazon detail page or Store with tracking parameters attached, replaces the plain Amazon URL in the external ad's destination field.
  4. When a shopper clicks, Amazon records the click and follows the session through product views, cart additions and purchases.

Credit follows a fixed rule. Amazon's guide states that "Amazon Attribution utilizes a 14-day, last-touch attribution model," meaning a conversion must happen within 14 days of a click, and "the conversion credit goes to the most recent click." The model is click-based: there is no view-through credit for someone who saw a YouTube video or display banner without clicking. Impressions and spend are not reported either, because Amazon never sees them; cost figures for return on ad spend (ROAS) have to be brought in from the publisher, either manually or through partner tools.

Scale is handled through bulk files and macros. Amazon's guide says advertisers can "measure up to 100,000 Google search keywords or 8,500 Facebook or Instagram ads by uploading a single file", exported from the Google Ads report editor or Facebook Ads Manager. Tags generated through the Amazon Ads API are, according to Amazon, "macro-enabled for Google, Facebook, and Instagram," so one tag per publisher can pass campaign, ad group and keyword values automatically.

What gets reported

Amazon's product page lists three groups of metrics:

  • Engagement: clicks, detail page views (DPV) and detail page view rate (DPVR)
  • Consideration: add-to-cart (ATC) and add-to-cart rate
  • Conversion: purchases, purchase rate, units sold, product sales and new-to-brand purchases

Two refinements matter. Brand halo columns capture sales of other products from the same brand, so a click to one shampoo listing that ends in a conditioner purchase still counts; Amazon's guide states that "total conversions equal promoted conversions plus brand halo conversions." New-to-brand purchases use a separate one-year lookback, counting shoppers who had not bought from the brand on Amazon in the previous 12 months.

Reports break down by channel, publisher, order, line item, search keyword and ASIN. Amazon advises waiting "1-2 days" before validating data and warns that "you may see a 10-20% discrepancy" between its click counts and those of a publisher or ad server, with gaps beyond 20% treated as a setup problem.

Who can use it, and where

Eligibility has widened in stages. As of November 2026, Amazon's product page names "professional sellers enrolled in Amazon Brand Registry, vendors, KDP authors, and agencies with clients who sell products on Amazon." KDP refers to Kindle Direct Publishing, Amazon's self-publishing service. The same page lists 18 marketplaces: the US, Canada, Mexico, Brazil, Germany, Spain, France, Italy, the Netherlands, Sweden, Turkey, the UK, Saudi Arabia, the UAE, Australia, India, Japan and Singapore. Amazon's older basics guide still names seven countries and still calls the product a beta, so Amazon's own documentation conflicts on both points.

Access runs through the Amazon Ads console - the basics guide now routes users through the Ads Agent interface under "Measurement and Reporting" - or through the Amazon Ads API. Tool providers such as Quartile use the API to automate tagging.

Origin and evolution

Amazon Attribution arrived as a closed beta. According to search agency JumpFly, it launched in 2019 "only as a beta to Amazon vendors and brand-registered sellers." By September 2019, PPC Land reported that Amazon had extended bulk tag creation to Facebook ads, covering Instagram, Messenger and Audience Network, with up to 8,500 tags from one uploaded file. A June 2020 PPC Land guide to enrolment still described it as "a free beta," open to Brand Registry sellers, vendors and agencies on amazon.com, and to vendors only on amazon.co.uk. Amazon later published a blog post announcing the beta's launch in Canada and Europe; that post could not be retrieved for this article, so its date is not confirmed here.

The largest change was commercial rather than technical. In July 2021, as reported by The Drum on July 16, 2021, Amazon attached a payment to the tool: the Brand Referral Bonus. US sellers who own a brand can earn, in Amazon's words, "a bonus averaging 10% of product sales driven by non-Amazon marketing efforts," measured through Attribution tags. The bonus also covers other products from the brand bought within 14 days of the click, and Amazon notes "a two-month processing time" before payment.

Amazon has also published a performance claim. Its basics guide cites an internal study of 93 advertisers between November 2020 and April 2021, finding that those who optimised external media using Attribution insights saw "an average 18% increase in new-to-brand sales." The study is Amazon's own and has not been independently replicated.

Why it matters

For brands, Attribution answers a question no other system can: whether a Google or TikTok campaign sold anything on Amazon. That makes it the only route to a sales-based ROAS for off-Amazon spend that lands on Amazon listings, and the only way to collect the referral bonus.

For Amazon, the logic runs the other way. Every measured click is a shopper sent to Amazon instead of a brand's own website, and every sale earns Amazon a referral fee, part of which the bonus returns. When Amazon moved view-tracked campaigns to a shopping-signal enhanced last-touch model on January 1, 2026, PPC Land noted the change did not affect Amazon Attribution, which kept its own methodology.

Limitations and disputes

Last click only. A 14-day, click-based, last-touch model ignores upper-funnel exposure and assigns full credit to the final tagged click.

No cost data. Without impressions or spend, ROAS and cost per acquisition require manual joins with publisher data, a step where errors multiply.

The scorekeeper benefits. Amazon is both the measurement provider and the retailer that earns the sale. Its figures cannot be audited from outside.

Halo inflation. Including brand halo sales enlarges the attributed total, which flatters ROAS against platforms that credit only the advertised item.

No incrementality. Attribution records which tagged click came last; it does not test whether the sale would have happened anyway.

Channel conflict. The bonus pays brands to send traffic to Amazon rather than to their own sites, a point raised in trade coverage at launch: The Drum framed the program in July 2021 as a way to entice brands to funnel more sales to Amazon.

Documentation drift. Amazon's own pages disagree on the number of supported countries and on whether the product is still in beta.

What Amazon Attribution is not

Sponsored ads attribution is the native reporting inside Sponsored Products, Sponsored Brands and Sponsored Display. It credits Amazon's own ads, uses their own windows and includes view-based rules, and has been reshaped by Amazon's 2026 reporting changes. Attribution measures external media only.

Amazon DSP off-Amazon conversions measure what happens on an advertiser's own website or app after exposure to DSP ads, using Amazon's ad tag and, since August 16, 2024 in the US, modeled conversions. That is the reverse direction: Amazon ads driving off-Amazon sales. Amazon renamed its DSP DVA on September 29, 2026.

Amazon Marketing Cloud (AMC) is a clean room where advertisers query event-level data with SQL and build custom attribution models. Attribution is a fixed-rule reporting product; AMC is an analysis environment.

The Brand Referral Bonus is a payment program, not a measurement tool. It depends on Attribution tags but is limited to US seller brand owners.

Recent developments

Amazon's measurement stack has changed around Attribution through 2025 and 2026. From October 1, 2025, Amazon changed how branded searches are identified in its attribution, with five branded search metrics across Sponsored Brands, Sponsored Display, Sponsored TV and the DSP. On November 13, 2025, conversion path reporting went worldwide, showing the top five paths in the 30 days before purchase across Amazon's own ad products. The January 1, 2026 view-attribution change left Attribution untouched.

On June 8, 2026, Amazon's unified reporting left beta, with the old Sponsored Ads and DSP report pages set to close on December 31, 2026; PPC Land has since reported that unmigrated reports will be lost on January 31, 2027. As of November 2026, Amazon's product page still presents Attribution as a separate, free tool with a 14-day window, available through the console and the API.

Timeline

  • 2019 - Amazon Attribution launches as a beta for vendors and brand-registered sellers, according to JumpFly
  • September 2019 - Bulk tag creation extends to Facebook, Instagram, Messenger and Audience Network ads, up to 8,500 tags per file
  • June 2020 - Still in free beta; open to US sellers, vendors and agencies, and UK vendors
  • November 2020 - April 2021 - Amazon's internal study of 93 advertisers, later cited as showing an 18% average new-to-brand sales increase
  • July 2021 - Brand Referral Bonus introduced for US seller brand owners, averaging 10% of attributed sales
  • August 16, 2024 - Amazon DSP adds modeled off-Amazon conversions for US advertisers
  • October 1, 2025 - Amazon changes branded search identification in its attribution
  • November 13, 2025 - Conversion path reporting launches worldwide
  • January 1, 2026 - Amazon applies enhanced last-touch rules to view-tracked campaigns; Amazon Attribution excluded
  • June 8, 2026 - Unified reporting reaches general availability
  • September 29, 2026 - Amazon DSP renamed DVA
  • December 31, 2026 - Scheduled closure of legacy Sponsored Ads and DSP report pages
  • January 31, 2027 - Unmigrated reports deleted, per PPC Land

Summary

Who: Amazon Ads runs the product. Professional sellers in Amazon Brand Registry, vendors, KDP authors and agencies can use it, directly or through API-integrated tool providers. US seller brand owners can also earn the Brand Referral Bonus.

What: A free measurement tool that tracks clicks from non-Amazon ads through tagged URLs and reports detail page views, add-to-carts, purchases, sales, brand halo and new-to-brand purchases on a 14-day, last-click basis.

When: Launched as a beta in 2019, tied to the Brand Referral Bonus in July 2021 and still offered as a separate tool as of November 2026, after Amazon's 2025 and 2026 reporting overhauls.

Where: In the Amazon Ads console and API, across 18 marketplaces listed on Amazon's product page, for traffic from search, social, display, video, email and influencer links that lands on Amazon.

Why: External platforms cannot see what happens on Amazon after a click. Attribution fills that gap for brands while giving Amazon a reason to become the destination for their off-Amazon marketing.