Your = one word = pronoun = states that you own or posess something
e.g., your page, your name, your date, your shoes, your car
You’re = two words = You are = verb = states that you are involved in some action
e.g., you are welcome, you are watching, you are wonderful, you are brilliant
Two words with an apostrophe rule: if you can use the two words, use them instead of contractions; if you can use the two words, you may correctly use the contractions instead.