Bob wants to see the trade-off between cost and conversion volume by experimenting with different adjustments to his cost per action (CPA), without risking budget to do so. What feature in DoubleClick Search could help Bob experiment?

Forecasting in DoubleClick Search allows Bob to simulate the impact of different CPA targets on conversion volume and cost without actually implementing the changes. This provides a risk-free way to understand the trade-offs. Portfolio bidding is a strategy for managing bids across multiple campaigns to achieve a specific goal, but it involves live adjustments, not simulations. Bid strategy health provides insights into the performance of existing bid strategies, not a tool for hypothetical scenario planning. Attribution modeling helps understand how different touchpoints contribute to conversions, which is distinct from forecasting the impact of CPA changes.