Ladies and gentlemen!
Let me introduce you to a neat little trick the english language has developed-

Homophones: these are words that are pronounced the same, but have different meanings and, often, different spellings.

I italicized the most relevant part. You can search "common homophone errors" for some basic lists of these. Learn them, use them properly, and be a more competent and literate adult.

Thanks,

Grammar Bitch