Oh what an awesome question!! The Knight Card... well, it's kind of like our everything as a SMC student!! So, the knight card is your id- it gets you into any building that has a card sensor (until 11 and then it's just your building) it is swiped for our unlimited meal plan into Alliot and it allows us free busing on any CCTA bus, it is like our library card when you want to check things out from the library or LLRC, and is it like a debit card, where you put money in your Knight Card account, either online or at our Knight Card office on the 2nd floor of Alliot so you can do laundry and buy things at our two cafes and vending machines. You can also use your knight card debit outside of campus at any participating restaurants or shops as well.
The Knight Card is truly amazing and offers so many things, so hope this answers your question :)
Feel free to ask me anything about SMC :) www.formspring.me/alexsmc14