You’re = You are
Your is possessive. (Whatever floats your boat)
They’re = They are
Their is possessive (I sank their boat by accident)
There is locative (I put that there)
“thare” is nothing.
To = directive (I am going to the store)
Too = additive (I want to go to the store, too!)
Two = numeric (There are two babies in this trash can! Help!)
I am going to help the two babies, too.
The word “it” does not follow standard grammatical conventions. The word “its” is possessive, while “it’s” means “it is.”
It’s unfortunate that people do not care about grammar, but to each their own.