The three budget modes — total, daily and impression goal — how flight dates and always-on campaigns work, and why booking early costs less.
Enter your budget in the market's currency in one of three ways:
Whichever you choose, you are charged only for impressions that deliver. See How billing works.
Set a start and end date, or switch on Run continuously for an always-on campaign that plays until you pause it.
Dates are in the market's local time. A campaign starts on its start date once its creative is approved; if approval lands after the start date, it starts as soon as it is approved.
The CPM includes a lead-time multiplier. Booking two weeks or more ahead is the base rate; booking inside a week costs more, and inside three days more again, because late inventory is scarcer. If you can plan ahead, do. See How pricing works.
The forecast tells you when your budget cannot be fully spent on the screens and hours you chose. It is labelled budget-capped when budget is the limit, and shows the available impressions when inventory is. One-click fixes appear: expand the radius, add a week, switch to Even pacing or All day. See Fixing a low-inventory forecast.
You can raise or lower the budget on a live campaign. The change goes through a quick re-approval and delivery adjusts from there. Spend already delivered is unaffected. See Edit, pause or cancel a campaign.