Why is a demand-led strategy specifically critical when using AI Max or Performance Max?
Correct Answer
It makes sure campaigns have sufficient budget to capture expanded reach driven by AI.
Why is this the correct answer?
A demand-led strategy matters here because it makes sure campaigns have sufficient budget to capture expanded reach driven by AI. AI Max and Performance Max are built to find relevant demand the advertiser has not explicitly targeted: new queries, new placements and new audiences discovered at auction time. That extra reach only converts into results if budget is available when the demand appears. A fixed daily cap set for a narrow keyword list becomes the binding constraint, so the campaign gets limited by budget and the AI is forced to leave qualifying auctions on the table. Demand-led budgeting turns that around: the efficiency goal, such as a Target CPA or Target ROAS, decides how much is worth spending, and budget is set high enough to let the campaign spend whatever meets that goal. Growth is then limited by profitability rather than by an arbitrary spending cap.
Why are the other options wrong?
It limits the number of auction-time signals the AI can process.
Budgeting does not restrict the signals available at auction time. AI Max and Performance Max use the same auction-time signals regardless of how budget is set.
It prevents responsive search ads being served as part of the campaign.
Responsive search ads are unaffected by budget strategy. Budget determines how often ads can serve, not which ad formats a campaign is eligible to use.
It makes sure the campaign only serves on exact match keywords.
Restricting serving to exact match would defeat the purpose of AI Max, which is designed to find relevant queries beyond the advertiser's existing keywords.
Real-world example
A retailer runs Performance Max at Target ROAS 400% on a £500 daily budget and sees it capped by lunchtime most days while still hitting target. Raising the budget to £1,200 lets the campaign keep buying auctions that meet the same ROAS. Spend nearly doubles, ROAS holds, and revenue rises — growth had been limited by the cap, not by demand.
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