Dayparting

Dayparting is varying your advertising intensity by time of day or day of week — bidding harder (or simply being present) during the hours your shoppers convert, and pulling back overnight or in dead hours.

Amazon doesn't natively schedule Sponsored Products by hour, so dayparting is implemented via API-driven bid or budget changes on a schedule, or approximated by setting budgets that naturally exhaust after the high-converting hours.

It matters most for products with strong time patterns (B2B items on weekdays, impulse buys in evenings) and for budget-capped campaigns where when the budget runs out decides which shoppers ever see you. For uncapped, always-profitable campaigns the gains are usually modest — fix bids, negatives, and budgets first.