How many bid strategies can each Search Ads 360 campaign have?

A Search Ads 360 campaign can have only 1 bid strategy applied to it at any given time because a bid strategy serves as a singular, unified optimization directive for a portfolio or a specific campaign. Since the automated bidding algorithm requires a clear, non-conflicting objective—such as a specific Target CPA or Target ROAS—to adjust bids and manage spend effectively, assigning multiple strategies would create competing goals that the system cannot reconcile simultaneously. While you can easily switch a campaign to a different strategy or include it within a larger portfolio strategy, the fundamental architecture of the platform dictates that a single campaign follows one specific set of automated bidding rules to ensure performance stability and accurate reporting.