When managing a complex Mail.ru advertising account structure, what account-level setting *directlycontrols the allocation of budgets across different campaigns?

The account-level setting that directly controls the allocation of budgets across different campaigns within a complex Mail.ru advertising account structure is the *shared account budget*. A shared account budget allows you to define a single budget that is then shared among multiple campaigns within the same account. This provides a centralized mechanism for managing and distributing funds, giving you greater flexibility and control over how your overall advertising budget is spent. Instead of setting individual budgets for each campaign, you can allocate the shared budget based on the performance and priorities of each campaign. The Mail.ru system then automatically optimizes the budget allocation across campaigns based on their performance relative to your overall goals, ensuring that the most effective campaigns receive adequate funding while potentially limiting spend on underperforming campaigns. Without a shared account budget, you would need to manually manage individual campaign budgets, which can be less efficient and responsive to changing campaign performance dynamics. Thus, this mechanism will automatically manage your budget according to what's important.