The Retargeting Fraud Score Card displays projected retargeting savings based on your settings and industry averages for the cost of retargeted users over the last 30 days. If you want to understand how retargeting fraud works, our NS8U library has this great article.
The dollar amount shown in green is the projected savings, and below that is the actual number of excluded users. Additionally, below the user count is a link to NS8's methodology used to detect invalid users.
NS8's retargeting fraud prevention works by placing suspect users on your Google Analytics retargeting list and marking them as users you do not want to market to. Your NS8 application settings will determine the minimum EQ8 Score that a user must meet in order to qualify as part of your retargeting audience.