Average views: This is the average number of views to the videos. It is calculated only if there is a video among the last 12 posts.
V.A.: it is the absolute value of the variations of following.
Follow/unfollow: when a profile starts following another one just to get its follow in return, and it stops following it after a few days. Follow/unfollow is not synonymous of automation.
Cleaning following: when a profile stops following many profiles all at once.
Mass following: when a profile starts following many profiles all at once.
Story viewer reporting: story viewers are automations programmed to view and respond to thousands of stories a day. The reports are made spontaneously by Not Just Analytics users based on the suspicious interactions they notice in their Instagram stories.