Doubt in Admission criteria

For some courses in German Universities such as TUM and University of Stuttgart, they have an aptitude assessment procedure which has a criteria that "For every tenth grade that the Bachelor's degree is better than 3.0, the applicant will receive X points. The maximum score is Y points". Could anyone explain this?

University of Stuttgart:
https://www.f05.uni-stuttgart.de/ei/dokumente/Guidelines_ZO_MSc_EENG_2018_02_EN_V1.pdf

#masters #ms #Germany