Performance by hour and day of week

Splits performance by hour of day and by day of week, in the account timezone. This is the evidence a schedule decision needs. Use when: the user is thinking about dayparting, or asks when their ads perform best. Do not use when: there is little data. Splitting a month across 168 hour-and-day buckets leaves most of them empty, and acting on an empty bucket is how campaigns lose their best hours. Returns the hour-of-day table and the day-of-week table separately, because the full 168-cell grid is almost never readable or reliable. Hours are in the account timezone, which may not be the user's. Before recommending a schedule, check the bidding strategy: Smart Bidding already varies bids by time of day, so a schedule mostly removes volume rather than improving efficiency. If you are unsure which account, campaign or period the user means, ask them — do not guess ids or dates.