Tool comparison

Amazon Ads vs Google Shopping: Which Platform Should Retailers Choose?

Updated Jun 14, 2026

Verdict

Amazon Ads and Google Shopping are not direct substitutes — they capture different stages of the buying journey and serve different e-commerce models. Amazon Ads reaches shoppers who have already decided to buy on Amazon, making it the highest-intent retail advertising environment for products sold through the Amazon marketplace. Google Shopping reaches shoppers still evaluating where to buy, appearing in Google Search at the moment of product interest. The right allocation depends on where your products are sold: if you sell on Amazon, Amazon Ads is non-optional for category visibility; if you sell on your own site, Google Shopping is the primary paid product-search channel. Many brands run both simultaneously, using Amazon for marketplace visibility and Google Shopping to drive traffic to owned channels.

Head-to-head

Purchase intent

Winner: Amazon Ads

Amazon Ads

Amazon Ads targets shoppers actively browsing or searching on Amazon — a platform they visit specifically to buy. Intent is late-stage and category-focused. Sponsored Products appear inline with organic Amazon search results, reaching users at the moment they are comparing specific products.

Google Merchant Center

Google Shopping reaches users earlier in the purchase journey, typically when they search for a product category or product name on Google. Intent is high compared to display or social advertising, but earlier-stage than Amazon — the user is deciding where to buy, not just which product to select.

Ad formats

Winner: Google Merchant Center

Amazon Ads

Amazon Ads includes Sponsored Products (keyword and product-targeted search placements), Sponsored Brands (banner ads with multiple products), Sponsored Display (retargeting and audience targeting both on and off Amazon), and Amazon DSP for programmatic inventory. All formats live within or extend from the Amazon ecosystem.

Google Merchant Center

Google Shopping Ads (via Performance Max or standard Shopping campaigns in Google Merchant Center) appear in Google Search, Google Shopping tab, and the Display Network. Performance Max extends Shopping across Search, YouTube, Discover, and Gmail from a single campaign. The format breadth across Google's properties is wider than Amazon's on-Amazon placements.

Targeting options

Winner: Amazon Ads

Amazon Ads

Amazon Ads targeting combines keyword targeting (broad, phrase, exact), product ASIN targeting (appear on competitor product pages), and audience targeting based on Amazon's shopper purchase history — first-party behavioral data that has no equivalent outside the Amazon ecosystem.

Google Merchant Center

Google Shopping targeting is primarily keyword and query-based through the product feed, with Performance Max layering in Google's audience signals (interest, behavior, in-market segments). Targeting precision is high, but the audience data is less purchase-validated than Amazon's behavioral segments.

ROAS and attribution

Winner: Amazon Ads

Amazon Ads

Amazon Ads attribution is closed-loop: the same platform handles the ad, the click, and the purchase. This makes ROAS reporting straightforward — what the platform reports is what actually happened on Amazon. Attribution windows are configurable per campaign.

Google Merchant Center

Google Shopping attribution requires your own GA4 or third-party measurement setup to connect ad spend to conversion revenue. Conversion tracking configuration, cross-device attribution, and cart-level revenue data all require implementation work. Performance Max attribution uses Google's data-driven model, which is accurate but less transparent.

Eligibility and fees

Winner: Google Merchant Center

Amazon Ads

Amazon Ads requires selling products on the Amazon marketplace. Ad spend is separate from Amazon's referral fees, FBA fees, and other seller costs. The total cost of selling on Amazon (ads + fees) is substantially higher than Google Shopping alone for many product categories.

Google Merchant Center

Google Shopping requires a Google Merchant Center account with a product feed and a Google Ads account for paid placements. There are free organic Shopping listings available for all eligible merchants. Eligibility is broader — any e-commerce retailer with a product feed can participate without platform selling fees.

Reporting and optimization

Winner: Amazon Ads

Amazon Ads

Amazon Ads reporting shows Search Term Reports, ASIN-level performance, Share of Voice data, and competitive rank insights within the Amazon ecosystem. Reporting is rich for Amazon-specific optimization but does not show cross-channel performance.

Google Merchant Center

Google Ads reporting via Performance Max is increasingly aggregated, with limited campaign-level transparency for Shopping specifically. Standard Shopping campaigns offer more granular search term and product-level reporting. Third-party tools (Merchant Center data exports, GA4) are commonly needed to build a complete reporting picture.

Choose Amazon Ads if

Brands selling products on the Amazon marketplace where category visibility directly drives Buy Box ownership and organic rank
Consumer goods brands where Amazon accounts for a significant percentage of total retail sales and competitive advertising is required for shelf visibility
Performance marketers targeting late-stage buyers with high purchase intent where Amazon's first-party shopper data delivers strong ROAS

Choose Google Merchant Center if

Direct-to-consumer brands selling exclusively on their own website who need to drive traffic from Google Search at the product category and product name query stage
Retailers with broad product catalogs who benefit from Google Shopping's free organic listings to supplement paid placements
Advertisers who want to reach shoppers across Google Search, YouTube, and Discover through Performance Max without being locked into the Amazon ecosystem

Frequently asked questions

Should I run both Amazon Ads and Google Shopping simultaneously?

Most brands that sell on Amazon and operate their own website do run both. Amazon Ads protects marketplace visibility and drives sales within Amazon. Google Shopping drives traffic to owned channels where margin is higher. The channels don't cannibalize each other because they serve different destinations. The risk to manage is customer journey confusion — some brands see cheaper Google Shopping clicks but lower conversion rates compared to Amazon, because the owned-site checkout experience is harder to optimize than Amazon's one-click purchase flow.

Which platform has better ROAS for consumer products?

Amazon Ads typically delivers higher reported ROAS for consumer products sold on Amazon because the purchase intent is later-stage and attribution is closed-loop. Google Shopping ROAS comparisons depend heavily on your own website's conversion rate, the competitive density of your product category in Google Search, and how well your product feed is optimized. Neither platform universally outperforms the other — the right comparison is within your own account, tracking the same product category on both platforms over the same period.

What is Google Merchant Center and how does it relate to Google Shopping?

Google Merchant Center is the platform where you upload and manage your product feed — the structured data file that tells Google about your products, prices, availability, and images. Google Shopping Ads are served using this feed data. You need a Merchant Center account to run any Shopping ads or appear in the free Shopping listings. Think of Merchant Center as the product database layer and Google Ads as the bidding and campaign layer on top of it.

Do I need a large budget to compete on Amazon Ads?

Amazon Ads requires consistent spend to maintain visibility in competitive categories — the auction is keyword-based, and bid levels in popular categories can be substantial. Smaller brands can compete effectively in niche categories with lower CPCs. The more important constraint is that underinvesting in Amazon Ads when competitors are spending heavily risks organic rank suppression over time, because advertising activity influences organic placement through the A9 algorithm. Budget requirements vary dramatically by category and competition level.

More tools

Freemium

Amazon Ads

Amazon Ads is Amazon's advertising platform for reaching shoppers and audiences across its store, streaming properties, and the wider web. Its products include self-service sponsored ads, Brand Stores, display and video formats, measurement tools, and Amazon DSP, with reporting tied closely to shopping activity. It is most useful for marketplace sellers, retail brands, and agencies that need commerce-oriented campaigns from product discovery through purchase.

Retail Media

Free

Google Merchant Center

Google Merchant Center is Google's product data and commerce management service for merchants. Businesses upload or connect product information, resolve feed and policy diagnostics, manage store details, and make eligible inventory available to free listings, Shopping ads, and product-based Performance Max campaigns. It is essential for retailers that need accurate titles, prices, availability, images, identifiers, and landing pages synchronized between their catalog and Google's shopping surfaces.

Google Ads