Google Ads is expanding Smart Bidding Exploration to Performance Max and Shopping campaigns, extending a Target ROAS bidding feature that was previously available only for Search campaigns. According to Search Engine Land, the feature gives Google’s automated bidding system more flexibility to pursue additional eligible searches that a standard Target ROAS strategy might otherwise overlook. Google has also published new help documentation explaining how the feature works across the three campaign types.
What Changes For Each Campaign Type
Smart Bidding Exploration is now supported across three Google Ads campaign types. Search keeps its existing support for exploring additional eligible search opportunities. For Performance Max, the expansion targets bidding opportunities on the Search channel by exploring additional searches among the campaign’s existing eligible terms. For Shopping, exploration can apply across both Search and Shopping traffic when the campaign uses a Merchant Center product feed.
The mechanism is deliberately conservative: rather than opening entirely new targeting methods, the feature widens the set of searches the bidding system will consider within each campaign’s existing eligibility. For Performance Max, exploration stays within the campaign’s eligible search terms; for Shopping, it works across both traffic sources the feed supports. Google describes it as expanding bidding opportunities rather than introducing new targeting.
The Eligibility Fine Print
Not every campaign can use it. Google’s requirements include Target ROAS bidding as mandatory, campaigns that are not limited by budget, and restrictions on portfolio bid strategies — which are only compatible with Smart Bidding Exploration for Search campaigns. The feature is also unavailable in Search Ads 360 for Shopping or retail Performance Max campaigns. Advertisers need to check their campaign configurations before enabing it, and Google makes no promise of better results: higher conversion volume and better ROAS depend on campaign conditions and the opportunities available.
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There is also a practical question of how exploration behaves inside Performance Max’s black-box structure. Because PMax already blends Search with Shopping, YouTube, Discover and Display inventory, the Search-channel exploration sits inside an asset-driven system where advertisers cannot see the exact queries exploration targets. Google says the feature explores additional searches among existing eligible terms rather than opening new themes, which should keep it close to the campaign’s existing intent profile. Still, advertisers who run tight keyword exclusions in Search campaigns may want to confirm whether their PMax negative-keyword posture carries over into exploration before switching it on.
Why It Matters
Smart Bidding Exploration is Google’s answer to a long-running advertiser complaint: automated bidding leaves eligible traffic on the table because it optimizes so tightly around historical converters. For ecommerce businesses running Shopping or Performance Max, the expansion offers a sanctioned way to let the system reach further — more conversion volume without manually expanding keyword targeting. The catch is the Target ROAS requirement and the no-budget-constraints rule, which concentrates the benefit on advertisers who already spend freely. Paired with Google’s recent push of AI-driven campaign types, including the automatic sourcing of Landing page images and Sourced videos in Performance Max, the direction is unmistakable: advertisers hand Google broader permission, and Google promises broader reach in return.
Background
Smart Bidding Exploration first shipped for Search campaigns as part of Google’s wave of automation features around Target ROAS and Target CPA. The expansion comes as Google keeps layering AI control into its ad products — the Google Ads API moved to a twice-monthly release cadence earlier this month, and the company recently told advertisers that target and budget changes no longer reset the learning period. Each change chips away at the manual levers advertisers once held, and exploration continues that pattern by widening the system’s latitude inside campaigns advertisers already run.
Source: Search Engine Land
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