Unlocking Needed for going abroad?

[Windows Central Question]

hey guys......
please help me...i have a question..

i am from india and i am going to canada for my studies.I have a lumia 930......
my question is will my lumia work over there???? or do i have to unlock the phone or something like that.....

i cant understand what to do....i read somewhere that the network frequency of Canada is different from that of India..and so phones from India might not work there..
but on another site i read that unlocked phones work

so please help me,,,what should i do????
And what does unlocking a phone mean??

with regards
Thanks
Rajdeep