If this is an existing IO, you can search for it in IO search box. If not, hit the plus bottom to add the new IO to the system. This includes a name, the flight dates, the IO level budget, and the status. As a reminder, the information here will apply to all campaigns placed under this IO, so the flight date range and the budget represent the max amounts that any campaign, in sum, can spend or run during. The status can be used to shut off all campaigns in one click running under the IO.
Additional IO settings:
1. Frequency caps - you can set a universal frequency cap to apply to all campaigns under the IO
2. Fluid budgets - you can create budget pools for specific campaigns to pull from