If you select“Maximize performance”as the bid strategy in order settings,but uncheck“bid optimization models,”what happens?

When "Maximize performance" is selected as the bid strategy but "bid optimization models" are unchecked, the Amazon DSP will default to bidding the base bid for all impressions. This means the system will not use its algorithms to dynamically adjust bids based on predicted performance or conversion likelihood. Instead, it will apply the static base bid you've set. The option "Amazon DSP will increase bids for all impressions" is incorrect because without optimization models, there's no mechanism to universally increase bids; it would only bid the base. "The Amazon DSP will adjust bids to ensure the campaign delivers the full budget" is also incorrect as bid optimization models are necessary for such dynamic adjustments to budget pacing and delivery.