Amazon DSP: Your Next Stage of Growth When Search Plateaus

Your Sponsored Products program is dialed in, budgets keep climbing, and growth keeps slowing. That's not a campaign problem — it's a ceiling. Here's how Amazon DSP (Demand-Side Platform) reaches the customers search structurally can't, and how to prove it's working.

Key Takeaways

• Search plateaus are a signal, not a failure. Once you've captured most active searchers, more Sponsored Products spend reaches the same shoppers at higher CPCs (cost per click).
• Sponsored Products captures demand. DSP creates it. Amazon DSP reaches competitor buyers, lapsed customers, and category newcomers before they ever search.
• Build the funnel from the bottom up. Start with retargeting and narrow audiences, then expand to consideration and prospecting as signals confirm what works.
• Separate line items by objective. Prospecting, consideration, and retention behave differently — mixing them in one line item makes measurement impossible.
• Judge DSP on incrementality, not blended ROAS (return on ad spend). New-to-Brand rate, holdout-tested lift, and customer LTV (lifetime value) tell you the truth.
• Give it 90 days. DSP is a learning system; judging it at week two means drawing conclusions before the data matures.

🎥 Watch the Full Session: Want to see the complete breakdown? You can check out the full recording for our webinar session here: Your Next Stage of Growth on Amazon Runs Through DSP.

Amazon's advertising business surpassed $68 billion in revenue in 2025, growing 22% year-over-year in Q4 alone, according to Marketing Dive. Amazon has become pay-to-play, and most of that spend still flows into search. But here's the catch: search only reaches shoppers who are already looking for something like your brand. Once your program matures, every incremental dollar competes harder for the same audience — and growth flattens no matter how well you optimize.

At Nectar, we've watched this pattern play out across hundreds of mature Amazon accounts, from challenger brands to enterprise CPG (consumer packaged goods). The brands that break through don't squeeze another 5% out of search. They add a demand-creation channel — Amazon DSP — structured in three tiers that mirror the funnel, and they measure it on incrementality instead of vanity ROAS.

Key Amazon DSP Stats:

• $68B+: Amazon's 2025 advertising revenue, up 22% YoY in Q4 — Marketing Dive
• 300M+: average monthly ad-supported audience Amazon Ads reaches in the U.S. — Amazon Ads
• 19%: higher conversion rate for Sponsored Products campaigns when combined with DSP — Perpetua research via SmartScout

Why Sponsored Ads Alone Stop Driving Growth

Diminishing returns are evidence your search program is doing its job — not proof it's broken.

"Sponsored ads captures existing demand. DSP creates net new demand." — Harriet Carson, VP of Advertising at Nectar

What Saturation Actually Looks Like

The pattern is consistent across mature Sponsored Products programs, regardless of category. In our work across Nectar's partner roster, the markers show up together:

• ROAS declining and CPCs rising even as budgets grow
• Impression share flat despite more spend
• ~70% of branded search clicks already yours once a program matures, leaving little left to capture
• 2–3× the CPC on non-brand keywords versus branded, as you bid into less-qualified traffic to find volume
• Flat total units because the marginal ACOS (advertising cost of sale) on each new dollar keeps rising

This isn't a bid or copy problem. Sponsored Products can only harvest existing demand from one pool — it cannot create a new shopper. When that pool is saturated, the question changes from "how do I optimize search for another 5%?" to "how do I create more people who will eventually search for my brand?"

Where the Next Customer Actually Comes From

True category growth comes from three pools, none of which search alone can reach consistently:

• Competitor buyers. Shoppers actively purchasing in your category — just from someone else. They're in-market and purchase-ready, but invisible to Sponsored Products because they never search for you.
• Lapsed customers. Past buyers who drifted away. They've already demonstrated trust in your brand, which makes reactivation one of the cheapest, highest-ROI moves available.
• Category newcomers. Shoppers entering your category for the first time, with no brand allegiances yet. The brand that reaches them early earns outsized share of wallet long-term.

Sponsored Products captures demand. DSP creates it. That single sentence is the mental model for everything that follows.

What Amazon DSP Actually Is

Amazon DSP is Amazon's programmatic advertising platform: instead of bidding on keywords, you buy access to defined audiences — built from Amazon's shopping, browsing, and streaming signals — across Amazon and off-Amazon placements. If Sponsored Products is buying keywords, DSP is buying audiences, wherever they happen to be. Amazon Ads reaches an average monthly ad-supported audience of more than 300 million people in the U.S., according to Amazon Ads, and its 2025–2026 streaming partnerships extend DSP to roughly 80% of U.S. streaming households, per Amazon Ads.

Sponsored Products vs. Amazon DSP

• What you buy: Sponsored Products buys keywords and search placements. DSP buys audiences, wherever they are.
• Demand role: Sponsored Products captures existing demand. DSP creates net-new demand.
• Reach: Sponsored Products reaches shoppers actively searching on Amazon. DSP reaches browsers, competitor product detail pages, streaming TV, audio, and the open web.
• Formats: Sponsored Products runs product listings in search results. DSP runs display, online video, streaming TV, and audio.
• Time to conversion: Most sponsored ad conversions happen within ~10 minutes of the click. Most DSP conversions happen ~7 days after exposure.
• Primary KPI: Sponsored Products lives on ROAS and ACOS. DSP lives on New-to-Brand (NTB) rate, holdout-tested lift, and customer LTV.

That last point matters more than any other. As Harriet put it in the session, over 70% of shoppers who click a sponsored ad convert within roughly the first 10 minutes — with DSP, most users convert about seven days after upper-funnel exposure. Judging the two channels by the same yardstick guarantees DSP looks underwhelming.

Pro Tip: DSP inventory quality has improved dramatically over the past 18 months — Netflix, Hulu, expanded Prime Video sports, and a much stronger podcast lineup. If you tested DSP two or three years ago and walked away, you tested a different product.

How DSP Expands Your Customer Base

The Four Audience Families

At Nectar, we build DSP audiences around four families that map directly onto the growth pools:

• In-market & lifestyle (prospecting): Amazon shoppers signaling category intent through recent browsing and buying behavior. Reaches category newcomers.
• Competitor conquest: shoppers viewing or buying specific competitor ASINs (Amazon Standard Identification Numbers) and brand pages. Reaches competitor buyers.
• Your 1P (first-party) & CRM audiences: past purchasers, subscribers, and lookalikes built from your own first-party data. Reaches lapsed customers.
• Retargeting & views: shoppers who viewed your detail pages or added to cart but didn't purchase. Captures high-intent consideration.

What separates DSP from Sponsored Display is the ability to layer exclusions over these audiences. Selling a consumable? Exclude anyone who purchased in the past 15–30 days. Conquesting a competitor's vitamin C? Exclude shoppers who just bought a 90-day supply — they won't be back in market for three months, and your budget shouldn't chase them.

Pro Tip: AMC (Amazon Marketing Cloud) audiences now work inside search too. Build a DSP audience of $200K+ household-income shoppers, set a low base bid on key terms, then apply a large bid increase for anyone exposed to that DSP campaign — you only pay up in search for the exact audience you want.

Beyond the Buy Box: Where DSP Reaches Shoppers

Shoppers don't spend their entire day on Amazon, and DSP follows them:

• Streaming TV & video: Prime Video, Fire TV, Twitch, plus partnerships spanning Netflix, Hulu, and live sports including the WNBA and MLB
• Audio: ad-supported Amazon Music and a rapidly expanding podcast lineup, including guaranteed host-read buys
• Amazon home & apps: homepage takeovers and high-visibility placements search simply doesn't offer, plus contextual targeting of competitor product detail pages
• The open web: Amazon's exchange extends reach to third-party sites and apps — targeted with Amazon's first-party shopping signals

Very few people wake up and search for your exact product. They discover brands gradually: a streaming ad, a browse session a few days later, then recognition when they finally search. That's the sequence DSP is built to engineer — and you don't even need to sell on Amazon to use it, since Amazon's non-endemic offering opens the same purchase signals and audiences to any brand.

Creative: Search Doesn't Need It. DSP Lives or Dies by It.

With Sponsored Products, your ad answers a question the shopper already asked. With DSP, you're interrupting a browsing session — the creative has to earn attention and answer "why should I care?" almost immediately. Three rules from our creative team:

• Lead with the brand, not the ASIN. Awareness placements should build recognition: logo, category cue, one clear benefit.
• Match creative to funnel stage. Awareness = brand story. Consideration = product proof and reviews. Retargeting = a reason to come back now. Responsive ecommerce creatives convert best at the bottom; static brand imagery works best for awareness. Some of the best-performing DSP creative is simple — UGC (user-generated content) outperforms polished production for many brands.
• Refresh before fatigue sets in. Frequency builds recognition, then erodes it. Rotate creative every few weeks and watch for rising frequency with falling response.

Want a second set of eyes on your ad creative before it goes live? Our creative studio builds DSP and product-page assets designed to lift click-through and conversion rates.

The Three-Tier DSP Structure

The Three-Tier DSP Structure is Nectar's campaign architecture that separates DSP line items by objective — Prospecting, Consideration, and Retention & Reactivation — so budgets, audiences, and measurement stay clean. It exists because the single most common setup mistake we see is every audience crammed into one line item, which makes optimization difficult and measurement almost impossible.

• Tier 1 — Prospecting: in-market, lifestyle, and competitor-conquest audiences. Optimized to New-to-Brand rate and detail-page views, not ROAS.
• Tier 2 — Consideration: retargeting of viewers and category browsers. Optimized to add-to-cart and purchase-intent signals.
• Tier 3 — Retention & Reactivation: past purchasers and lapsed 1P audiences. Optimized to repeat purchase and Subscribe & Save.

Each tier carries different expected ROAS, different frequency caps, and different creative. Separate them and Amazon's programmatic engine optimizes within each budget — and you gain real visibility into where incremental growth is coming from. One caveat: don't over-segment either. Too many line items fragments budget below the learning threshold.

"The goal isn't just spending more, it's spending more effectively and efficiently." — Harriet Carson, VP of Advertising at Nectar

How to Know DSP Is Actually Working

"Is DSP actually working, or just taking credit for sales I'd have gotten anyway?" is the question we hear more than any other — and it's the right one. A shopper sees your DSP ad Monday, doesn't click, searches your brand Thursday, and buys through Sponsored Products. Last-click attribution hands that sale to search. Would the search have happened without Monday's exposure? Standard ROAS reporting can't answer that. Incrementality measurement can.

The Three Numbers That Tell You the Truth

Blended ROAS hides the answer. These three, read together, reveal whether DSP is creating customers:

• New-to-Brand (NTB) rate. The share of DSP-driven orders from customers who haven't bought your brand in a year. Rising NTB is the fingerprint of demand creation. There's supporting evidence the combination works: Sponsored Products campaigns see a 19% higher conversion rate when paired with DSP, according to Perpetua research.
• Holdout-tested lift. Sales in an exposed group versus a matched control that saw no DSP. This is the closest thing to a true incrementality read.
• Customer LTV. What a DSP-acquired customer is worth over 90+ days. A modest first-order ROAS can be excellent once repeat value is counted.

If your DSP reports show ROAS without NTB rate and holdout-tested lift, they're measuring the wrong thing.

Amazon Marketing Cloud Is Where the Proof Lives

AMC is Amazon's privacy-safe clean room — anonymized, aggregated data that lets you connect DSP, sponsored ads, and increasingly organic behavior in one place. It's how you move past last-touch ROAS to the questions that matter: cross-channel path to purchase, true new-to-brand analysis, exposed-vs-control holdouts built inside AMC, and audience overlap with frequency diminishing-returns curves. In our experience, AMC measures the impact of upper-funnel on downstream Amazon conversions better than any other programmatic environment, because purchase behavior lives in the same dataset.

Two things most brands miss. First, AMC goes far beyond templated reports — custom queries can answer questions like "at what discount rate does Subscribe & Save drop-off change after the first purchase?" Second, Amazon has made several paid AMC data subscriptions free through December 2026, including datasets that tie organic behavior to paid — so you can see, at the product or keyword level, which new-to-brand customers came in organically versus through ads. That's data Amazon never released before.

We've gone deep on this in our AMC and incrementality practice, and iDerive unifies those advertising and incrementality views with sales, ops, and profit data.

What a Successful DSP Program Delivers in 90 Days

DSP is a compounding investment, not a switch. One of the biggest mistakes advertisers make is analyzing DSP too early or expecting it to behave exactly like Sponsored Products — it won't.

"If you're judging success after two weeks, you're almost certainly drawing conclusions before the data is mature enough." — Harriet Carson, VP of Advertising at Nectar

• Month 1 — what to expect: audiences live, creative in market, learning phase. Watch detail-page view rate and branded search activity. Cost per NTB is high. What NOT to expect: strong blended ROAS — the model is still learning.
• Month 2 — what to expect: NTB rate climbing, retargeting efficient, first holdout readable, light optimizations. What NOT to expect: a clean incrementality verdict — signal is still building.
• Month 3+ — what to expect: incremental ROAS decisions, LTV curve emerging, budget reallocation to the tiers that prove incremental. What NOT to expect: search-level efficiency — DSP plays a different, earlier role.

By day 90, three milestones should be tracked: audience architecture live with NTB as the benchmark, enough signal for a statistically valid holdout, and an incrementality decision that shifts budget based on incremental — not blended — ROAS. If none of these are being tracked at day 90, the program is running on hope, not measurement.

Four Ways DSP Programs Fail

None of these are DSP's fault. They're setup and measurement mistakes we see repeatedly:

• Judging it on blended ROAS. Measuring a demand-creation channel with a demand-capture yardstick guarantees it looks underwhelming.
• No holdout, no control. Without a control group, every sale near an impression gets credited to DSP — or dismissed. Neither is true.
• One audience, one line item. Mixing prospecting and retargeting in a single line item makes it impossible to see what worked.
• Turning it off too early. Killing the program at week six is like reading a book's first chapter and complaining it had no ending.

Your First 30 Days on Amazon DSP

You don't need to boil the ocean. A focused launch beats a sprawling one every time — and if budget is limited, start at the bottom of the funnel with retargeting or very narrow audiences you know are your target, then expand upward as signals confirm what works.

• Week 1 — Foundations: Pull 1P audiences, define competitor ASIN lists, and set NTB rate as the north-star metric before a dollar is spent.
• Week 2 — Build & launch: Stand up the three-tier structure, load creative per stage, and reserve the holdout control group.
• Week 3 — Learn: Let the model exit its roughly two-week learning phase. Watch reach, frequency, and detail-page views — not ROAS.
• Week 4 — First read: Review NTB rate and early retargeting efficiency. Adjust audiences; leave the holdout untouched.

Where DSP Fits in the Media Mix

DSP is incremental budget with an incremental job — not a reallocation away from what's working. Protect the Sponsored Products budget that's already converting, add DSP as a distinct growth line with its own NTB and lift goals, and scale the tiers that prove incremental rather than the ones that look good on blended ROAS.

How much is enough? There's no fixed number that works for every brand — it depends on category, market position, product-level saturation, and P&L. But some grounded reference points from our engagements: retargeting typically moves the needle at roughly $3K–$5K per month per product given a healthy pool of PDP (product detail page) traffic. Enterprise brands allocate anywhere from 10% to 50% of Amazon ad budget to DSP; if you're starting out, 10–15% is a sensible entry point. The one rule of thumb that always holds: enough to keep audiences out of a permanent learning phase, sustained long enough to run one clean holdout. If the budget can't survive 90 days, it's too small to prove anything.

Not sure whether your search program is actually saturated yet? Our strategic audit will tell you — product by product.

Glossary

• ACOS (Advertising Cost of Sale): ad spend divided by ad-attributed sales; the inverse of ROAS.
• AMC (Amazon Marketing Cloud): Amazon's privacy-safe clean room for cross-channel attribution, audience building, and incrementality analysis.
• ASIN (Amazon Standard Identification Number): the unique ID for every product listed on Amazon.
• CPC (Cost Per Click): the price paid each time a shopper clicks an ad.
• DSP (Demand-Side Platform): Amazon's programmatic platform for buying display, video, and audio ads on and off Amazon by audience rather than keyword.
• Holdout test: an experiment comparing an ad-exposed group to a matched control group that saw no ads, isolating true lift.
• Incrementality: sales that would not have happened without the ad exposure — the standard executives should hold DSP to.
• LTV (Lifetime Value): total revenue a customer generates over time, not just their first order.
• Non-endemic brand: a brand that doesn't sell on Amazon but advertises through Amazon DSP.
• NTB (New-to-Brand): a buyer who hasn't purchased from your brand on Amazon in the prior 12 months.
• PDP (Product Detail Page): the main product listing page on Amazon where shoppers convert.
• ROAS (Return on Ad Spend): ad-attributed revenue divided by ad spend.
• Sponsored Products: Amazon's keyword-based search ads — the demand-capture workhorse of most ad programs.
• Three-Tier DSP Structure: Nectar's DSP campaign architecture separating Prospecting, Consideration, and Retention & Reactivation into distinct line items.

Frequently Asked Questions

What Is Amazon DSP?

Amazon DSP (Demand-Side Platform) is Amazon's programmatic advertising platform. Instead of bidding on keywords, you buy access to audiences built from Amazon's shopping, browsing, and streaming signals — across Amazon placements, Prime Video, Fire TV, audio, and the open web. Where Sponsored Products captures existing search demand, DSP creates net-new demand by reaching shoppers before they search.

Isn't Amazon DSP Just for Huge Brands?

No. The floor has come down considerably. What matters is having enough margin and inventory to sustain a 90-day test — not a Fortune 500 budget. In practice, 99% of brands can use DSP for retargeting alone, since it offers exclusion controls Sponsored Display can't match.

How Much Do We Need to Spend on Amazon DSP?

Enough to keep audiences out of a permanent learning phase and run one clean holdout — sized to your category, not a template. As reference points from Nectar's engagements: retargeting typically moves the needle at $3K–$5K per month per product, enterprise brands allocate 10–50% of Amazon ad budget to DSP, and new programs sensibly start around 10–15%.

How Fast Will We See Results From DSP?

Retargeting efficiency shows early — often within the first month. The incrementality and LTV story is a 90-day read by design, not a first-week ROAS number. Most shoppers convert about seven days after DSP exposure, versus minutes after a sponsored ad click, so the reporting cadence has to match the channel.

What's the Difference Between Amazon DSP and Sponsored Display?

Sponsored Display is one slice of what DSP does. DSP adds prospecting, streaming TV, audio, off-Amazon reach, and — critically — audience exclusions. For example, DSP lets you exclude shoppers who purchased a competitor's product in the last 30 days, so you're not paying to reach people who just bought a 90-day supply. See the full comparison above.

How Do I Know DSP Isn't Taking Credit for Sales I'd Have Gotten Anyway?

Run the measurement stack: New-to-Brand rate, holdout tests against a matched control group, and lapsed-reactivation separated from net-new acquisition. AMC (Amazon Marketing Cloud) makes all three practical by connecting DSP exposure, search behavior, and purchases in one privacy-safe dataset. If your reporting shows ROAS without NTB and holdout lift, it's measuring the wrong thing.

Do I Need to Sell on Amazon to Use Amazon DSP?

No. Amazon has expanded its non-endemic offering aggressively. Brands that don't sell on Amazon can still tap Amazon's purchase-behavior signals, upload hashed customer files for lookalike modeling, and access third-party audiences from partners like LiveRamp and Mastercard — plus Prime Video inventory that other DSPs like The Trade Desk can't offer.

How Do I Get Access to Amazon DSP?

Unless you're spending roughly $150K–$200K per month on DSP, you won't get your own seat today — most brands access it through an agency with a managed DSP service, like Nectar's retail media team. Amazon's automated tools (Performance+ and Brand+) may eventually unlock more direct access, but agency-managed remains the standard path in 2026.

Break Through the Ceiling

If your Amazon growth has plateaued despite rising search budgets, the customers who will drive your next phase of growth aren't searching for you yet. The ceiling is real — and the path through it runs through DSP, structured in three tiers and measured on incrementality. We've built DSP programs for large consumer brands and can show you exactly what incremental growth looks like for yours.

Talk to Our Amazon Team

Related Reading

• How to Win Prime Day 2026 Like the Top Amazon Brands — The 3-phase Prime Day playbook, including how to load DSP audiences before the event.
• Winning on Amazon in 2026: How AI Lets You Answer in 30 Seconds What Used to Take a Week — What it looks like when an Amazon team can answer any data question in 30 seconds.
• Amazon DSP at Nectar — How we structure, run, and measure managed DSP programs.
• AMC & Incrementality Analysis — The clean-room measurement practice behind everything in this post.