Daily budgets and pacing: why a campaign spends unevenly

Advertisers often expect a daily budget to be spent in an even line through the day. In practice spend follows the traffic, and pacing decides how much of the budget is used when.

How pacing works

• The daily budget is the most a campaign can spend in a day.
• Pacing spreads that budget across the day so it doesn't run out in the first hour.
• The DSP uses seasonality-aware pacing, which takes into account that traffic is heavier at some hours and on some days than others (introduced in DSP v7.2, see the release notes).

Why spend can still look uneven

• Traffic peaks. Evenings and weekends often have more traffic, so more is spent then.
• Narrow targeting. A small audience may not offer enough impressions to use the budget.
• Low bids. If the bid wins only at quiet hours, spend clusters there.
• Schedules. A campaign scheduled for certain hours only spends in those hours.

What advertisers can do

1. Check the campaign's status first; it names the reason when spend is limited.
2. Use hour ranges in reports to see when the campaign actually spends.
3. Add a schedule if only some hours convert.
4. Raise the bid, or widen targeting, if the budget is never reached.

Related: Campaign statuses and the "why no traffic" answer · Delivery is much lower than expected