Understand percentage-based limits inside a CBO campaign
This video tests a percentage-based ad set maximum as a way to manage a group taking most of the campaign budget. The important distinction is between a spending ceiling and a forced allocation.
Diagnose the spending pattern first
A small group of established ads may receive most of the budget while new creative barely spends. That can reflect stronger existing performance, or leave a new test with too little evidence. Review the results before assuming the largest-spending group needs to be restricted.
Understand what the maximum controls
In the demonstrated feature, a percentage maximum sets the largest share an ad set can receive. It is still allowed to spend less. That is different from assigning a fixed budget the group must use or guaranteeing that another group will perform better.
Consider what changes when the budget grows
A fixed dollar ceiling stays the same when the campaign budget changes. A percentage ceiling moves with that budget. The video uses this difference to explain why the two controls can produce different spending patterns as the account scales.
Treat the setting as a defined test
The recording describes an early experiment, not a universal percentage every account should copy. Choose a change for a clear reason, observe where budget goes, and evaluate the whole result. Preserve the role of the campaign budget rather than turning every group into a permanent manual allocation.
