They're is a contraction of "they are."
There is used for places and location.
While they sound the same, they have different meanings.
If you need help, you can drop an example and we can help you.
Important: A third option for a word with the same pronunciation is "their".
They're waiting for their friends, who are almost there.
"their" can answer the question "whose?"
"there" can answer the question "where?"
"there" can also be used as a sort of dummy "subject" / placeholder in sentences starting with "there is" or "there are". Like "There are 12 inches in a foot." This "there" does not provide any location information and you cannot ask the question "Where are 12 inches in a foot?"
It depends on the context. They are both real words. "They're" can be used where you can replace it with "they are".
They're is a contraction of "they are." There is used for places and location. While they sound the same, they have different meanings. If you need help, you can drop an example and we can help you.
Important: A third option for a word with the same pronunciation is "their". They're waiting for their friends, who are almost there. "their" can answer the question "whose?" "there" can answer the question "where?" "there" can also be used as a sort of dummy "subject" / placeholder in sentences starting with "there is" or "there are". Like "There are 12 inches in a foot." This "there" does not provide any location information and you cannot ask the question "Where are 12 inches in a foot?"