There are two kinds of Amazon advertising programs. The first is an account where someone set up a few automatic campaigns years ago, added some manual campaigns when they heard that was best practice, and has been adjusting bids sporadically ever since. The second is a structured program with a clear architecture, deliberate targeting logic, and a systematic optimization cadence that improves performance month over month.
Most brands are running the first kind of program and wondering why their ACoS keeps creeping up or why scaling ad spend doesn't seem to scale revenue proportionally. This guide builds the second kind of program from scratch.
The Foundation: Campaign Architecture
Your campaign structure is the backbone of everything else. Poor structure makes it impossible to optimize because you can't see what's working at a granular enough level. Strong structure gives you the clarity to make decisions based on actual data.
The Three-Layer System
The most effective Amazon advertising architecture we've used across hundreds of accounts has three distinct layers working together:
Layer 1 - Discovery (Automatic Campaigns): Automatic campaigns let Amazon's algorithm find relevant searches for your products. They're not your most efficient campaigns, but they're your best source of new keyword discovery. Structure your automatic campaigns with separate ad groups for close match, loose match, substitutes, and complements targets so you can bid and control them independently. Harvest the search terms that convert from automatic campaigns weekly and add them to your manual campaigns.
Layer 2 - Efficiency (Manual Exact Campaigns): Your best-performing keywords, both discovered through auto campaigns and researched through keyword tools, go into exact match manual campaigns. These campaigns give you the most control over bid and budget allocation. They're where you concentrate spend on proven terms. Structure these campaigns by product and keyword theme, not by throwing all keywords into one campaign.
Layer 3 - Scale (Manual Phrase/Broad with Negatives): Phrase and broad match campaigns expand your reach beyond your exact match list while phrase and broad match modifiers give you control over relevance. The key to making these campaigns efficient is aggressive negative keyword management. Without systematic negatives, broad and phrase campaigns will generate irrelevant traffic that burns budget and inflates ACoS.
Campaign Segmentation by Product
Every product or closely related product group should have its own campaign structure. Mixing unrelated products into the same campaign makes budget allocation impossible. If a high-performing product shares a budget with a low-performing one, you can't allocate spend optimally to either.
The practical segmentation logic: one campaign set (auto + exact + phrase) per parent ASIN or close variation cluster. If you have 50 parent ASINs, you should have approximately 150 campaigns in a fully built-out account. This sounds like a lot. It is. It's also the only way to optimize at scale.
Keyword Research: Building Your Initial Targeting Universe
Before you can build campaigns, you need a comprehensive keyword universe for each product. Effective keyword research for Amazon includes:
- Amazon's own search suggestions: Type your main product term into Amazon's search bar and capture every autocomplete suggestion. These are real searches Amazon users are making.
- Competitor ASIN reverse lookup: Tools like Helium 10's Cerebro or Jungle Scout's Keyword Scout let you enter a competing ASIN and see what keywords it ranks for and receives traffic from. This is one of the most efficient ways to discover relevant search terms at scale.
- Your own search term reports: If you've been advertising even minimally, your search term reports contain real buyer intent data from actual searches that led to your product. This is your highest-quality keyword source.
- Category browse nodes and subcategories: Understanding how Amazon categorizes your products reveals how buyers navigate to them outside of search.
- Semantic expansion: Beyond the obvious product terms, think about use case terms, problem terms, ingredient or component terms, and occasion terms. A skincare product might be searched as "moisturizer," "dry skin remedy," "niacinamide serum," "before makeup moisturizer," or dozens of other angles.
Organize your keyword universe by relevance and likely commercial intent before loading campaigns. Keywords with high purchase intent (specific product terms, comparison terms) get higher bids and go into exact match campaigns first. Broader category terms with lower intent go into phrase or broad campaigns at more conservative bids.
Bidding Strategy: How to Set and Adjust Bids
Bid management is where most Amazon advertising programs make their biggest mistakes. Both setting bids too low (missing impression share and visibility) and setting them too high (destroying ACoS) are common. The right approach is systematic and data-driven.
Initial Bid Setting
For new campaigns where you have no performance history, start with Amazon's suggested bid as a reference point but don't simply use it. Adjust based on your target ACoS:
Your target bid for a keyword can be calculated as: (Conversion Rate) x (Average Order Value) x (Target ACoS). For example, if you expect a 12% conversion rate, your product sells for $35, and your target ACoS is 20%, your target bid is 0.12 x $35 x 0.20 = $0.84 per click. This gives you a mathematically grounded starting point.
The challenge is that for new campaigns you don't have your actual conversion rate. Use your listing's overall conversion rate from your Business Reports as a proxy initially, then update bids as campaign-specific data accumulates.
Ongoing Bid Optimization
Once campaigns have accumulated data, bid optimization becomes a data analysis task. The core rule: raise bids on high-converting, low-ACoS terms; lower bids or add as negatives on high-spend, zero-conversion terms.
Specifically:
- Any keyword or search term with more than 10 to 15 clicks and zero conversions is a candidate for bid reduction or negation.
- Any keyword performing at or below your target ACoS with meaningful volume deserves a bid increase to capture more impression share.
- Any keyword performing significantly above target ACoS but with conversions should be bid down, not negated, to improve efficiency.
- Apply bid adjustments in increments of 15 to 25%, not 50% jumps. Aggressive bid changes create volatile campaign performance that's hard to interpret.
Amazon's Dynamic Bidding Options
Amazon offers three dynamic bidding strategies: "Down only" reduces your bid when Amazon judges a click less likely to convert. "Up and down" lets Amazon raise or lower bids up to 100% based on conversion likelihood. "Fixed bids" use exactly your set bid with no adjustment.
For most campaigns, "Down only" is the safest default. It lets Amazon reduce waste without risking the bid inflation that "Up and down" can produce. Once you have strong performance data on specific campaigns, "Up and down" may be appropriate to maximize exposure on your best opportunities.
Negative Keyword Strategy
Negative keyword management is the most underutilized optimization lever in Amazon advertising. Most accounts we audit have inadequate negatives, resulting in budget waste on irrelevant searches.
Build your negative keyword list from two sources: your search term reports (add exact negatives for any irrelevant terms that have generated clicks) and proactive research (think about searches that might superficially match your keywords but that you know won't convert, like competitor brand names in certain contexts, irrelevant product types that share terms with your product, and searches indicating a different buyer intent).
Run a search term report analysis weekly for active campaigns and process new negatives as part of your routine optimization. Brands that do this consistently see ACoS improve meaningfully over three to six months even without changing anything else.
Product Targeting: Competitor and Category Campaigns
Beyond keyword targeting, Amazon allows you to target specific ASINs and product categories. This is one of the most powerful tools in your arsenal for competitive positioning:
- Competitor ASIN targeting: Your ads appear on competitor product detail pages, reaching buyers who are actively considering an alternative. This can be highly cost-effective when your product has a genuine advantage over the competitor you're targeting.
- Defensive ASIN targeting: Target your own ASINs so competitors can't advertise on your product pages without paying for it. This is particularly important for high-traffic hero SKUs.
- Category targeting: Reach all products in a category with the option to refine by price range, star rating, and Prime eligibility. Useful for broad awareness within your category.
Separate product targeting campaigns from keyword campaigns. Mixing targeting types makes optimization harder and budget allocation unclear.
The Optimization Cadence: What to Review and When
Consistency in optimization is more valuable than intensity. An account reviewed for an hour every week will outperform an account that gets eight hours of attention once a month, because Amazon's auction dynamics change continuously and delayed optimization means prolonged waste or missed opportunity.
- Weekly: Search term report review and negative keyword additions. Bid adjustments on any keyword with more than 15 clicks since last review. Budget pacing review to ensure high-performing campaigns aren't hitting budget caps.
- Monthly: Campaign-level performance review against ACoS and revenue targets. Portfolio-level advertising efficiency review. New keyword discovery from automatic campaigns. Structural adjustments for any campaigns that have consistently over- or under-delivered.
- Quarterly: Full account audit. Review campaign architecture against current product catalog. Reassess target ACoS for each product based on updated unit economics. Evaluate new ad types or targeting strategies to test.
Connecting Advertising to Organic Rank
One of the most important and underappreciated aspects of Amazon advertising is its impact on organic ranking. Sales velocity, including sales from advertising, is one of the primary inputs into Amazon's organic ranking algorithm. This means advertising spend is not purely a margin cost if it generates velocity that drives organic ranking improvement.
When evaluating advertising ROI, model the full value: direct ROAS from advertising plus the estimated value of organic ranking improvement. A product that improves from page three to page one through advertising-driven velocity gains generates significantly more revenue from organic traffic that costs you nothing in advertising spend.
This framing changes the calculus for launch-phase advertising particularly. Running a higher ACoS during a new product launch to build velocity and organic rank is not waste. It's an investment with a quantifiable expected return in the form of improved organic position.
Ready to Grow Your Amazon Business?
Online Brand Growth manages Amazon advertising programs for brands generating $1M to $50M+ in annual Amazon revenue. Jon Klein and Dan Balda have built, audited, and scaled hundreds of Amazon ad accounts and know exactly what a well-structured program looks like and what it delivers. If your advertising program isn't scaling efficiently or your ACoS is drifting in the wrong direction, book a free 45-minute strategy call with our team. We'll tell you exactly what needs to change and what it should be generating.