That really depends on your niche and research. You must first do a research on your audience and on how often do they come online and their activities (follow back ratio etc) then you decide from there.
i assume the follow notification disappears after you unfollow them but have always wondered about this. I do 3 days to keep the account followings at a reasonable level
It’s important to unfollow them in their offline timezone, if possible, so they might oversee the notification. But that highly depends on your filters regarding what kind of activity your demographic has.
But there isn’t an unfollow notification necessarily, so they would just see their followers drop, but not necessarily know who unfollowed. Esp with it getting harder for the “unfollow tracker” apps to work with the new IG API limits.
anything between 1 and 5 depending on the account and need.
B2B has 5 days and never unfollows followers
B2C can be as low as 1 day to keep the followings number down
It would be super interesting to test the difference this makes in different niches. I never thought of it in terms of how often people in different niches open their apps etc