What is the basic difference between your & yours???

Your - possessive adjective, it's used as an adjective. Ex:- Your book is old. Yours - possessive pronoun, it's used as a pronoun. Ex:- She is my sister and they are yours.

Example, this is my pencil > this is mine. This is your pencil > this is yours. So, Used in place of the name> "s". Example, my car is better than yours. I was hoping i could explain.