For most kids, parents separating means that they have two places to call home, and they will often divide their time between mum's place and dad's place. Some kids may live half the time at mum's and half the time at dad's, while other kids might live mostly with one parent and stay with the other on weekends or holidays.
This can be fun, but can also be tricky sometimes. Often two homes mean two different routines and sets of rules to learn. For example, maybe Dad lets you eat in front of the TV but Mum likes you to eat at the table - stuff like that.
If you go to school already, you will be used to different rules in different places. I'm sure your mum doesn't make you put your hand up when you want to ask a question or you don't have to ask her if you want to go to the toilet, like the rules at school!