From Net-Results Support
Your Email Activity
The column chart shows your main statistics by whatever date range you select. This includes activity across all campaigns that ran during the given timeframe. As you check and un-check categories of activity and move the timeframe, the graph will alter accordingly.
With a simple pie chart, Net-Results shows your current mailable and non-mailable Contacts. This includes Contacts in all Lists, as well as Contacts not in a list (e.g. new/undefined/ISP visitors). The actual counts are displayed below.
Active and Recent Campaigns
These sections give you immediate glances at the performance of your currently active and recently retired Campaigns. Check your Opens, Clicks, or Visits, or click on the name of the Campaign to go straight to it (then view the full Statistics).
Note: The statistics on the Marketing Dashboard are updated hourly.