The first graph in the summary allows you to select 2 metrics and view a breakdown for each day in the lifetime of a campaign or Advertiser.
The ‘Volume by Hour (UTC)’ bar displays impressions on a scale from low volume in blue to high volume in red, displaying how impression volume and spend vary throughout the day. This information displays in Coordinated Universal Time (UTC).
Below the volume by hour chart you can see top apps, top sites and top exchanges by volume of impressions.
This summary also includes metrics for the top Creatives in your campaign for a quick comparison of impressions, clicks and spend.
The last section of the summary is an interactive map shaded by volume of impressions. Hover over a spot on the map to see metrics for a state or country.