Ask ten Amazon sellers whether they should run auto or manual campaigns and you will get ten different answers — usually because most sellers treat it as an either/or decision. It isn’t. Auto and manual campaigns solve different problems, and the accounts that scale profitably almost always run both, feeding one into the other on a continuous cycle.
At StoreStride we structure every account we manage around this relationship. This guide breaks down exactly what each campaign type does, when to lean on which, and the keyword harvesting workflow that turns auto campaign data into your highest-performing manual keywords.
The short answer: auto campaigns are for discovery — finding out what Amazon’s algorithm thinks your product matches. Manual campaigns are for control — putting your budget precisely behind the keywords and ASINs you already know convert. You need both, running at the same time, for the life of the listing.
What Is an Amazon Auto Campaign?
An auto campaign hands targeting decisions to Amazon. You set a daily budget and a default bid, and Amazon matches your ad to shopper search terms based on your product’s title, bullet points, backend keywords, and category. You do not choose the keywords — Amazon does, using four internal targeting groups:
- Close match — search terms closely related to your product
- Loose match — broader, more loosely related search terms
- Substitutes — other products similar to yours that shoppers might view instead
- Complements — products often bought alongside yours
You can bid these four groups independently within one auto campaign, which gives you more control than most sellers realise — more on that below.
What Is an Amazon Manual Campaign?
A manual campaign puts you in charge of targeting. You choose the exact keywords (keyword targeting) or the exact competitor and category ASINs (product targeting) you want your ads to appear against, and you set individual bids for each one. Nothing is left to Amazon’s interpretation.
🤖 Auto Campaign
Amazon chooses what you target. Best for discovery, new listings with no data, and finding search terms you would never have thought to bid on manually.
🎯 Manual Campaign
You choose exactly what you target and how much you pay. Best for scaling proven keywords, defending your brand terms, and controlling ACOS precisely.
Key Differences at a Glance
The practical differences come down to control, data quality, and how quickly each campaign type teaches you something useful:
- Control: Manual gives you keyword and bid-level precision. Auto gives you none — you only control the four targeting group bids.
- Discovery: Auto surfaces search terms you would never have guessed, including long-tail and misspelt variations. Manual only reaches terms you explicitly add.
- Setup effort: Auto takes minutes to launch. Manual requires keyword research first — either from Cerebro-style reverse ASIN tools or from harvested auto data.
- Efficiency over time: Manual campaigns typically deliver a lower, more predictable ACOS once mature, because spend is concentrated on proven converters rather than spread across everything Amazon thinks might match.
- Best use case: Auto for research and new listings. Manual for scaling what works and protecting your brand terms and Buy Box.
When to Lean on Auto Campaigns
Auto campaigns earn their keep in specific situations:
- Brand new listings with zero data. You have no idea yet which search terms convert. Auto tells you, cheaply, within the first 1–2 weeks.
- Ongoing keyword discovery. Even mature listings should run a small, permanent auto campaign — shopper search behaviour shifts, and new relevant terms emerge over time.
- Category and competitor exposure. The Substitutes and Complements targeting groups put your ads in front of shoppers browsing adjacent and competing products, which manual product targeting can replicate but rarely discovers first.
- Low-effort account maintenance. If you are managing dozens of ASINs, auto campaigns provide a baseline of coverage without requiring keyword-level upkeep on every single one.
When to Lean on Manual Campaigns
Manual campaigns take over once you have data and a listing worth defending:
- Scaling proven converters. Once the search term report shows a keyword converting well inside an auto campaign, move it to manual and give it a dedicated, higher bid to capture more volume.
- Defending your brand name. Bid on your own brand and product name as exact match to keep competitors and hijackers from appearing above your organic listing in search.
- Precise ACOS control. Because you set individual bids, manual campaigns are how you actually hit a target ACOS rather than hoping for one.
- Competitor conquesting. Manual product targeting lets you bid directly on competitor ASINs and their category pages — something auto’s Substitutes group only approximates.
- Negative keyword control. Manual campaigns let you exclude irrelevant or low-converting terms at the keyword level, tightening spend as data accumulates.
Common mistake: switching off auto campaigns once manual is up and running. This throws away your ongoing discovery engine. Keep a lean auto campaign live permanently, even on mature ASINs — just at a lower budget than your manual campaigns.
The Keyword Harvesting Workflow: Auto Feeds Manual
This is the process that actually matters — the reason auto and manual are not competing strategies but stages of the same one.
Launch Auto Alongside Manual From Day One
Even on a new listing, run a broad manual campaign (using your best-guess keyword research) and an auto campaign simultaneously. Give the auto campaign a modest daily budget — its job is data collection, not volume.
Let It Run 2–3 Weeks Minimum
Resist touching bids daily. You need enough impressions and clicks per search term to make a reliable decision — generally at least 10–15 clicks per term before judging performance.
Pull the Search Term Report
Download the auto campaign’s search term report from Seller Central or your PPC software. Sort by orders, then by ACOS, to find terms that are both converting and profitable.
Harvest Winners Into Manual
Any search term with strong conversions and acceptable ACOS gets added to your manual campaign as an exact match keyword, with a bid set to win more of that specific traffic. This is how you scale what is already proven to work.
Negate the Losers Everywhere
Search terms that spent money with no sales — or a high ACOS with low sales — get added as negative exact keywords in the auto campaign (and any manual campaign broad-matching to them). This stops the same wasted spend recurring month after month.
Repeat on a Fixed Cycle
Harvesting is not a one-time task. Review search term reports weekly for new accounts, fortnightly to monthly once stable. New converting terms and new wasted spend appear continuously as your listing accumulates reviews and ranking.
What to Look For in the Search Term Report
Not every row deserves action. Focus your review time on:
Getting More Out of Auto: Bid the Four Targeting Groups Separately
Most sellers set one bid for an entire auto campaign and never touch it again. That leaves performance on the table, because Close Match, Loose Match, Substitutes, and Complements behave completely differently. Once you have a few weeks of data, break out placement and targeting group performance and bid them individually — typically Close Match earns the highest bid since it converts best, while Loose Match and Substitutes get a lower bid to control spend on lower-intent traffic.
Use Portfolio and campaign naming conventions to keep auto and manual campaigns for the same ASIN clearly linked — e.g. “[ASIN] – Auto” and “[ASIN] – Manual Exact.” This makes weekly harvesting reviews far faster once you are managing more than a handful of listings.
What a Mature Account’s Structure Looks Like
By the time a listing has 2–3 months of PPC data, a well-run account typically looks like this per ASIN:
- One lean auto campaign — low budget, running permanently for ongoing discovery and category exposure
- One manual exact match campaign — harvested converting keywords, highest bids, majority of spend
- One manual phrase or broad match campaign — slightly wider net around your best exact terms, feeding more harvest candidates
- One product targeting campaign — competitor ASINs and relevant category pages
- One defensive brand campaign — your own brand and product name, protecting the top of your own search results
Spend is weighted heavily toward the manual exact match and defensive campaigns, with auto and broader manual campaigns kept lean and treated as ongoing research budgets rather than primary sales drivers.
Not sure your account structure is right?
StoreStride audits campaign structure, harvesting cadence, and bid strategy for private label sellers across Amazon UK and international marketplaces. We’ll show you exactly where auto and manual budget is being wasted — and where it should be going instead.
Book a Free Audit Call →Common Questions About Auto vs Manual Campaigns
Should I ever run only auto or only manual?
Running only auto means you never gain precise control over spend or ACOS, and you leave brand defence and competitor conquesting entirely to chance. Running only manual means you stop discovering new converting search terms and miss category exposure through Substitutes and Complements. Both alone leave performance on the table — run both, permanently.
How much budget should go to auto vs manual?
There is no fixed ratio, but a common starting point for an established listing is 15–25% of total PPC budget on auto (for ongoing discovery) and the remainder on manual campaigns, weighted toward exact match. New listings with no data often start closer to 50/50 until harvesting produces enough proven manual keywords.
How often should I harvest keywords from auto to manual?
Weekly for new or fast-moving listings, fortnightly to monthly for stable, mature ones. The right cadence is whenever you have accumulated enough clicks per search term (roughly 10–15) to judge performance reliably — checking too early leads to decisions based on noise.
Do auto campaigns hurt my ACOS?
They typically run at a somewhat higher ACOS than mature manual campaigns because they are spending on discovery, including terms that will not convert. This is expected and by design — the value of an auto campaign is measured by what it teaches you for manual, not by its own standalone ACOS.