How Do You Track Conversions on Amazon DSP?

You track conversions on Amazon DSP using an Amazon tracking pixel or an Amazon Attribution tag placed on your off-Amazon landing pages, which reports back to Amazon when a DSP-driven visitor completes a purchase or other defined action on your own site. For campaigns driving traffic within Amazon itself, conversion tracking runs through Amazon's own purchase and shopping-signal data instead, and as of January 1, 2026, that on-Amazon attribution runs on a new model that changed how view-through conversions get counted.

Tracking Off-Amazon Conversions

When a DSP line item sends traffic to an external URL — your own ecommerce site, for example — Amazon needs a way to know when that visitor converts there. Advertisers handle this with either an Amazon tracking pixel, a code snippet placed on the confirmation or thank-you page, or an Amazon Attribution tag, a unique parameter appended to the landing page URL for that line item. When the pixel fires or the tagged URL registers the conversion, Amazon credits it back to the DSP campaign that drove the click.

The 2026 Attribution Model Change

On January 1, 2026, Amazon introduced a shopping-signal enhanced last-touch attribution model that changes how view-through conversions are counted for certain Sponsored Brands, Sponsored Display vCPM, and Amazon DSP campaigns serving ads inside the Amazon Store. Instead of a fixed 14-day click and 14-day view attribution window, the new model uses a machine-learning evaluation of whether a given ad view actually contributed to the eventual sale, weighting early discovery moments like exploratory browsing or general category searches. Click-based attribution is unchanged by this update — only view-through counting is affected.

Why DSP Revenue May Look Lower Without Real Sales Declining

Because the new model qualifies fewer ad views as attributed conversions than the old flat 14-day window did, advertisers are seeing DSP revenue and ROAS reported lower in 2026 even when actual underlying sales haven't dropped. That's a reporting-methodology shift, not a performance decline — but comparing 2026 DSP ROAS directly against pre-2026 numbers, without accounting for the model change, will understate how the campaign is actually performing.

Setup Steps for Off-Amazon Tracking

Generate a tracking pixel or Attribution tag. Inside your DSP line item setup, choose either the pixel snippet or the Attribution URL tag depending on your landing page setup.

Place it on the conversion page. Install the pixel on your purchase-confirmation or thank-you page, or append the Attribution tag to your DSP-driven landing page URL.

Name events consistently. Since Amazon aggregates pixel conversions by event name, use distinct, deliberate names for each conversion type you want reported separately.

Bottom Line

Set up an Amazon pixel or Attribution tag on every off-Amazon landing page your DSP campaigns drive to, and name your conversion events deliberately since Amazon aggregates by event name rather than by individual pixel. If your on-Amazon DSP ROAS looks worse starting in 2026 reporting, check whether the shopping-signal enhanced attribution model explains the drop before assuming campaign performance actually declined — click-based conversions are unaffected, so a click-heavy campaign's numbers should hold steady while a view-driven campaign's numbers may shift materially.

Sources: Amazon Ads Support Center's conversion tracking and pixel requirement pages; attribution model change detail from Amazon Ads' "View Attribution Updates for Amazon Store Ads" announcement, cross-checked against Code3's and PPC Land's 2026 coverage.