Some tracks are harder to master than others.
Both the tracks of the Nurburgring Nordschleife & Spa Francorchamps for example, with lengths of 21km & 7km respectively.
Special days which split the track in different segments, allow the driver to run past the same group of corners repeatedly, over and over again while following the pace of a leading car with a certified instructor.
A course aimed to people who prefer to focus on perfecting their technique and approach or better learn specific segments of the track, via a more methodical way.