Unless you are a manager, you may only get 6-10 hours a week. No job security, nor annual or sick leave.
Depending on what store you work at, it can be really boring and get low customers. You could work a 5hr shift and get no 10min break.
Expected to buy your own clothes to wear to work (Work suited clothes).
Some managers play favorites with staff, so don't expect many hours if you need more than 10 you may not get it.