There, their or they're?
Do not confuse there, their, and they're. That would be a serious mistake.Take a look at the examples:

They're is short for they are.
Their shows possession. It's just like my, his, her, and our.
There is a place. It's similar to here.
They're, Their, and There
You must not confuse they're, their, and there. A mistake involving these is a grammatical howler.