When your site is new, your visitors are random. You probably has less than 10 visitors a day.
Around 0 - 50 Visitors a Day
After launching for probably a year, the Curve starts to show. Usually, you have around 100 to 200 visitors a day.
Around 100 - 400 Visitors a Day
‘The Curve’, good sign now! Steadily visitors and you can focus in conversion now! The Curve happens because source of visitors are stable.
More than 800 Visitors a Day
The peak is on Tuesday and the dip is on Sunday.