The binding study advice (BSA) is a decision by your institution as to whether you can continue with your programme and is generally based on the number of credits you have obtained.
Every institution is obliged to give you a positive or negative study advice at the end of your first year. The institutions themselves decide whether this advice is binding or not. The institutions themselves may also determine the minimum number of points that you must obtain in order to receive a positive recommendation. The exact number of points is described in the Teaching and Examination Regulations (OER) of your programme. The OER of your programme must have been sent to you or can be found on the website of your programme.
If this advice is negative, you will unfortunately have to stop your programme, unless there are special circumstances. If you have received a negative BSA, it is still possible to follow another programme at the same institution, or the same programme at another institution.