For most of Amazon’s history, advertisers were forced to optimise campaigns using yesterday’s information. Sponsored Products performance data arrived with a delay, meaning every adjustment—every bid change, keyword tweak, or pacing update—was based on conditions that might already have shifted. Amazon advertising behaved like a lagging system, even though competition inside the auction moved minute by minute.
Amazon Marketing Stream (AMS) finally closes that gap. Instead of waiting for daily reports or repeatedly polling the API, AMS delivers hourly, near real-time performance metrics straight into your systems through the Amazon Ads API. It is the closest advertisers have come to managing Amazon ads as a live, continuous environment.
Used well, AMS doesn’t just provide more data—it enables a different style of optimisation entirely. You move from static weekly adjustments to dynamic, evidence-led decisions.
What Amazon Marketing Stream actually is
Amazon describes Marketing Stream as a push-based messaging system. Rather than requesting reports manually or relying on delayed bulk files, you subscribe once to the datasets you need and Amazon streams them to your AWS environment as they happen.
The most valuable datasets for advertisers include:
- Hourly Sponsored Products performance metrics (impressions, clicks, CPC, spend, orders, sales)
- Placement-level performance data (Top of Search, Product Pages, Rest of Search)
These two datasets alone provide a level of granularity that daily reporting simply cannot match. Instead of static daily snapshots, you now receive a continuous signal that reveals how your campaigns behave throughout the day. Once you see hourly patterns, the limitations of daily averages become immediately clear.
Why hourly data changes optimisation
Daily reporting hides the truth. A campaign that looks acceptable in a 24-hour summary may actually waste budget during low-intent hours, overspend during competitive surges, or miss its strongest conversion windows if it hits the budget cap too early.
With AMS, these hidden patterns become visible. You start to see the rhythm of your campaigns: when conversion climbs, when CPCs spike, when traffic quality weakens, and when pacing issues cost you revenue.
This enables much more precise optimisation. You can begin practising true dayparting—raising bids and budgets during hours when conversion is strong and reducing spend where performance consistently drops. You can prevent out-of-budget mistakes before losing your best hours. And you can react to unexpected shifts far faster, whether driven by competitors, seasonality, events, or catalogue changes.
In short, AMS allows you to push the same budget into the hours that actually convert, creating more efficient and more stable advertising.
How to use AMS without drowning in data
Although AMS unlocks powerful possibilities, you don’t need a sophisticated engineering build to start benefiting. The key is to begin small, establish visibility, and gradually build automation only when you’re confident in the patterns you’re observing.
A simple, pragmatic adoption path looks like this:
- Subscribe only to the core datasets initially and feed them into a BI tool to visualise hourly CPC, conversion, spend, and ACOS.
- Use the emerging hourly patterns to set clear dayparting rules—reducing bids during low-return hours and increasing spend during high-conversion windows.
This early structure provides clarity without overwhelming you with data. As your organisation becomes more confident, you can introduce notifications for out-of-budget events, automated bid adjustments for predictable patterns, or more advanced intra-day optimisation models.
But the foundation remains the same: acting on granularity instead of admiring it. AMS gives you the resolution; your job is to use it.
Why AMS is becoming table stakes for serious advertisers
Amazon’s auction rewards precision. As more advertisers adopt AMS, those who continue using flat, same-every-hour bidding strategies will steadily lose ground. If your competitors are adjusting budgets, bids, and placements based on real-time hourly performance—and you are still optimising once per day—you are simply playing a slower game.
AMS creates an optimisation loop that improves pacing, reduces waste, stabilises ROAS, and ensures your strongest hours receive the attention and investment they deserve. It transforms Sponsored Products from a daily-maintenance channel into a live system that demands, and rewards, active management.
For brands spending meaningful amounts on Amazon, AMS is no longer optional. It represents the new baseline for competitive Sponsored Products advertising. Those who adopt it early gain a compounding advantage; those who don’t will increasingly struggle to defend performance against better-informed rivals.