Not everybody wants to spend their holidays in a
hotel room. You might prefer to have your own cooking facilities and a little more space than what the standard hotel room would offer.
Apartments can be great value for money if you have children but they are less common than studios and it is rare to find something that is larger than two rooms (generally a bed room and a living room that can also be used for sleeping).
If you need something larger you might find more choice looking for a holiday villa (but those will often be in slightly more remote areas).
You will generally find more choice of studios and apartments on the north coast of Crete than on the South coast which is less developed but there are some on offer. Just make sure to book in advance.