This is the quick and dirty.
There - This is an adverb. We use this word to describe a destination, location, or place.
Example: The Montreal Canadiens are in the NHL playoff finals. I wish we could go there to see a game.
Their - This is a possessive pronoun. We use this word when we want to describe ownership or belonging.
Example: The coach for the Montreal Canadiens contracted COVID. Their interim coach for now is Luke Richardson.
They’re - This is the contracted form of 'they are'. We use this form when we speak and in casual writing.
Example: The Montreal Canadiens surprised everyone by getting to the NHL playoff finals. They’re definitely the underdogs.
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