Around that place; nearby; the area around a place indicated by the speaker/listener.
駅のその辺で待ち合わせしよう。
Let's meet somewhere around the station.
あの店はその辺にあるはずだよ。
That shop should be around there.
その辺にベンチがあるから座ろう。
There's a bench around there, so let's sit.
Used to indicate an approximate amount or degree; meaning 'or thereabouts' or 'or so'.
会議はその辺に終わると思うよ（＝そのくらいの時間に終わる）。
I think the meeting will end around then (or so).
歩いてその辺で五分くらいだ。
It's about five minutes on foot from there.
Refers vaguely to that kind of matter or topic; 'such a thing' or 'that sort of thing'.
その辺のことは本人に直接聞いてほしい。
I want you to ask the person directly about that matter.
その辺の事情は詳しく説明できない。
I can't explain the details of that matter.