Their/They're/There

'There' refers to a place or location, 'they're' is a contraction of 'they are', and 'their' is a possessive pronoun used to indicate ownership.

'There is a book on the table.'

'They're going to the concert tonight.'

'Their house is on the corner of the street.'

'There' indicates a location or existence of something.

'They're' is a contraction that means 'they are'.

'Their' signifies possession or ownership.

'There are many stars in the sky.'

'They're studying for their exams.'

'Their car is parked outside.'