Can I change the selected deals, budget, or CPMs after getting the forecast?

Yes, you can modify your line item settings, including the selected deals, budget, and CPMs, after receiving the forecast or even after publishing your line items. However, please note that any changes made to these parameters will strongly affect the outcomes and that the forecast is adjusted based on last days inventory availability. Therefore, it is advisable to carefully review and adjust your line item settings before launching your campaign.