How the Maximize Conversion Value bid strategy works
Google Ads Help describes it as a Smart Bidding strategy that "helps you get the most conversion value from your budget", and says the system aims to spend your full daily budget while doing so. In practice the maximise conversion value bid strategy takes the budget as fixed, bids up on auctions it predicts will return high value and pulls back on weak ones. There is no built-in return target, so it is indifferent to efficiency: it will spend the last dollar of budget on a low-return conversion if that is the best remaining option. Google's help page lists two preconditions worth checking first. The account needs conversion tracking with transaction-specific values, and the strategy is offered on Search, Shopping and Demand Gen campaigns.
With and without a target ROAS
You can attach an optional target ROAS to Maximize Conversion Value, and doing so changes its character entirely. Google's documentation says that with a target set, the strategy "will behave like a Target ROAS strategy". Without a target, it spends the full budget chasing total value and the budget is the only guardrail. With a target, the ROAS threshold becomes the guardrail and the strategy will underspend the budget rather than dip below it. That is the real choice: growth mode, where you accept whatever return the budget buys, or efficiency mode, where you accept whatever volume the target allows. Knowing which mode an account is in is essential, because the same campaign behaves very differently in each.
The budget trap
The classic failure is running Maximize Conversion Value with no target ROAS and a budget larger than the profitable demand available. The strategy dutifully spends the whole budget, reaching down into progressively worse auctions to do so, and blended efficiency collapses while the strategy reports doing exactly what it was told. Two related cases cause the same damage. The first is switching over a campaign that was underspending its budget: Google's help page itself warns that spend could rise sharply, because the strategy now tries to use the full daily amount. The second is weak value data. If every conversion carries the same static value, or values do not reflect real revenue, the strategy is optimising toward numbers that do not match the business. The fix is to size the budget to genuinely profitable demand, pass real values, or attach a target ROAS.
Where Maximize Conversion Value fits among conversion bidding strategies
Google's conversion bidding strategies split along two lines. The first is what they count: Maximize Conversions and target CPA treat every conversion as equal, while Maximize Conversion Value and target ROAS weigh each conversion by what it is worth. The second is what constrains them: the two Maximize strategies are led by the budget, while the two target strategies are led by an efficiency goal. Maximize Conversion Value is the value-weighted, budget-led option. It suits accounts where order values vary widely and the budget is genuinely the limit, which is why it often comes before tROAS in an account's life: it builds the trailing ROAS data a sensible first target is set from.
