Budget optimize analyses the historical relationship between spend & conversions (or revenue) & provides insight to achieve optimal CPA or ROI performance
Using regression techniques & solver functions, budget optimize can identify the optimal CPA for your campaigns.
Budget optimize provides recommendations for allocated budgets between Google Ads campaigns in order to minimise the account CPA, or maximise account ROI.
With Budget Optimize you can visualise your campaign budgets at different levels of spend and how that would affect results.