Dayparting means changing your Amazon advertising bids, budgets or campaign status according to the time of day or day of the week. A campaign might bid 20% higher between 7 pm and 11 pm, when its buyers shop, and 30% lower between 2 am and 6 am, when clicks rarely become orders. Amazon's console offers scheduling through campaign rules in some marketplaces and formats; most sellers implement dayparting through third-party software or the Amazon Ads API.
Why it matters
Amazon's daily budget spends whenever there is traffic, so a campaign with a tight budget can exhaust it on early-morning browsers and be dark when the evening buyers arrive. Dayparting fixes that mismatch. When a product has a clear hourly pattern, the usual result is the same sales for less spend, or more sales at the same ACoS, because the money moves toward the hours where conversion is highest.
It does not help every product. Items bought on impulse across the day, or accounts with budgets that never run out, show flat hourly conversion and gain little. The evidence has to come first.
What moves it
- Hourly data. Amazon's reports are daily; hourly patterns come from the Amazon Marketing Stream or from software that samples the console.
- Time zone. Amazon reports in the marketplace's time zone, not the seller's. Dayparting for amazon.co.uk from Texas needs the offset accounted for.
- Attribution delay. Orders are attributed to the click's hour, but the order can arrive days later, so a fresh week's hourly conversion always looks weak.
- Weekday versus weekend, which often differ more than hour to hour.
How we use it
We only introduce dayparting when at least four weeks of hourly data show a consistent pattern in conversion rate or cost per order, and we start with bid adjustments rather than switching campaigns off, so we never disappear from a keyword entirely. The change is measured against the previous four weeks on spend, orders and ACoS, and reversed if it does not hold.