Even though you're and your sound the same, they mean two very different things.You're is a contraction of "you are," as in "You're cute" (or "You are cute"). Contractions combine two words and usually use an apostrophe (’). Contractions like you’re are very common in spoken English.
Your is a possessive adjective. It describes a noun by telling us to whom it belongs, as in, "I love your new dress!" (The dress belongs to you.) Other possessive adjectives are: my, his, her, their, and our.
You can make sure that you use the correct word. Try this. Replace the word you're not sure about with "you are." If you can understand the sentence, use you're. If you can’t, use your.
You're vs. Your Grammar Quiz
You're vs. Your Lessons: