Their: Possesive; Their mother
They're: They are; They're going to the bank
If it doesn't fit the categories above use 'There': Put that over there
Your: Possesive; Your eyes are pretty
You're: You are; You're all really fun
Our: Belonging to more than one person; Our dog
Are: Commonly used in the form of a question; Are you serious?... If you don't know the difference please use this when you are doubting yourself or even if you're not because it's always good to double check


FACTS ABOUT ME:
Favorite Food: Potatoes
Favorite Color: Purple
Favorite Animal: Cheetah
Hobbies: Music, Art, Watching anime and Reading, Spending more time than I have focused on BTS, TxT, and Twice