This page lists various limits in the Google Ads API along with the corresponding error
that is thrown when the limit is exceeded. General product limits, such as the
number of campaigns per account, is listed in the
Google Ads Help Center.
Account
Maximum number of Google Ads accounts in a manager account hierarchy
The budgets limit is 1,000 more than the number of campaigns limit to allow for some room in reassigning budgets if needed. There is no restriction on the number of campaigns that can share a budget.
This limit does not apply to operations on ProductPartition criteria changes that do not modify the structure of the tree. For example, a request that only modifies the bids of existing partitions can contain operations for more than two Shopping ad groups.If you want to modify the structure of the ProductPartition tree for more than two Shopping ad groups, consider using batch jobs, where this restriction does not apply.