The to-do list guides you through all administrative steps you have to take in order to finish your program. It tells you how to arrange each phase of your Master: choosing your division, composing your program, your internship, your graduation etc. It's very important that you follow these steps proactively; it's your responsibility to make sure that you arrange things in time and follow procedures accurately.
Please note that these are only administrative requirements. The requirements in terms of content, skills and quality you need to meet to graduate successfully, are being described in the regulations (PER and ER).