Which of these choices would make a good optional secondary bid strategy for a client using Maximize Conversion Value?

In the context of bidding strategies for clients using Maximize Conversion Value, choosing Target Return On Ad Spend (tROAS) as a secondary bid strategy is logical and strategic. This is primarily because tROAS aligns well with the goals of maximizing conversion value through efficient budget utilization. When clients set a tROAS target, they are effectively indicating the amount of value they wish to receive for each dollar spent on ads.

By combining Maximize Conversion Value with tROAS, a client can not only focus on generating more conversions but also ensure that those conversions are yielding a satisfactory return on their advertising investment. This dual approach allows for optimization that is not just volume-driven but also value-focused, making it an excellent complement to the primary strategy.

In contrast, other strategies such as Maximize Clicks or Enhanced CPC do not prioritize conversion values directly, and using them as a secondary strategy might lead to less efficient budget allocation. Manual Max CPC could potentially constrain the automation benefits that come with using Maximize Conversion Value, as it requires more hands-on management and may not adequately reflect the dynamic nature of maximizing revenue. Thus, tROAS serves as the most effective secondary bid strategy in this scenario.