For the example below
There is no change between yesterday and today, so you see — . For the week, you have +215 more followers compared to the previous week
This means you had 20 more compared to yesterday and +221 more following compared to last week
You had 7 more posts compared to the previous week
If there is no change between days or weeks, or if the change is negligible (i.e. "0.0001"), this stat displays as "—".