Theyre orientation days designed to introduce you to the admin and procedures of both enrolling and general administration at uni.
Theyre recommended as this year seems to be the most clueless, but not necessary, you could very well just go through and do things without all the 'help' the uni gives.
even the short lady.. the something of Dean couldnt explain to me abt B BA/B Psych.. it's so confusing.. even to the girl in front of me she was like, "i'm sure other ppl would be more than happy to help you", yerriteBS