Target ROAS Bidding

Measured as

Measure Target ROAS Bidding with a fixed attribution window, conversion event, and spend basis before comparing campaigns or creative tests.

Misused when

• Setting a target ROAS above what your funnel can sustain and starving delivery.
• Changing target ROAS too often and resetting learning.

Operator takeaway

• Use consistent conversion value rules (refunds and discounts matter).
• Validate with marginal ROAS and incrementality as spend scales.
• Start with a realistic target based on break-even and margin goals.
• Use Target ROAS Bidding only inside a stable attribution rule, conversion definition, and time window so campaign comparisons stay honest.
• If performance changes, check whether the metric moved for a real business reason or because the measurement setup changed underneath you.

Next decision

• Quantify the impact with Target ROAS Calculator if you need to turn the definition into an operating assumption.
• Read Marginal ROAS: how to scale ads with diminishing returns if the decision depends on interpretation, policy, or trade-offs beyond the raw formula.