Is it possible to manage budgets/optimize bids by specifying any period or date? Also, can multiple different periods be set for each campaign?

Yes, it is possible.

By pressing the plus button next to "Standard Settings" in "Budget Settings," you can set the budget for any desired period or date.

Additionally, by using the budget group function, you can set different periods for multiple groups, such as setting the budget for campaign groups A, B, and C from ◯ month ◯ day to ◯ month ◯ day, and for campaign groups D, E, and F from △ month △ day to △ month △ day.

When setting multiple different periods, for the period of ○ month ○ day to ○ month ○ day for campaign groups A, B, and C, campaign D, E, and F will likely be outside the management scope, so you can turn off the ON/OFF button next to the budget input field. Conversely, for the △ month △ day to △ month △ day setting for campaign groups D, E, and F, you can turn off campaign groups A, B, and C for individual management.

For more details on budget group settings, please refer to the related articles below.

[Related Information]

・In what units can the budget be set other than for the entire promotion?