In each cell, or day, of the calendar you will see a purple number. That data is a measure of your listing's visibility on Airbnb's website. The purple number is the best page on which your listings appears when someone searches for an Airbnb in your area.
When the three purple dots appear in a day (...) instead of a number, it means that we still do not have the data for that day and we are calculating it. This is usually a matter of a short time, maybe a couple of hours.