Here's an overview of the new features and how to use them:
For each network, daypart, and combination, the traffic estimator will now include an estimated number of spots.
Cost per Spot Estimates
In addition to the number of spots and cost per spot, the traffic estimator will also provide a visual representation of how the impressions for each spot contribute to the impressions delivered within the given network/daypart. This provides a quick visual sense of which spots are driving impression counts.
Link - from Traditional Media Let's Take