The Net Reporter Score (NRS) is a way to calculate the overall success rate of your phishing campaign. For all test emails sent to your targets, it is the difference, as a percentage, of the number of targets that failed the phishing campaign and the number that reported the test emails. It follows the simple formula below:
((Total Reported - Total Failed) / Total Targets) * 100
If more targets fail than report, the score will be negative. If more report than fail, the number will be positive. If every target fails, the NRS will be -100. If every target reports, the NRS will be 100.
Example: if 18% of the targets included in a test failed and only 5% reported, then the NRS score of the test would be -13%.
Before a target can report the email as phishing, they must have the KillPhish or Report Phishing plugin installed. (However, Portal admins can manually log report actions on their tests. Read about doing this in the following article: https://support.phishingbox.com/hc/en-us/articles/360047052433-Test-Details#h_2b6be783-4182-4680-adab-2b50b20abf9f)
Read more about the Net Reporter Score in this article.