Your is a possessive pronoun which refers to belonging to a person or people that the speaker is addressing whereas you’re is contraception for you are.. Example :
1. I have borrowed your mascara for a minute.
2. You’re looking fab today with this dress.

It’s is a short form for it is whereas its is a possessive pronoun that means belonging to it. . Example :
1. It’s your duty to inform the truth to your parents.
2. John is obsessed with this both and its author.