is placed in/on; has been left in/onDescribes something that someone has placed and that remains in a particular location. The particle に marks the location, while 置いてある indicates the resulting state. The exact term usually appears before the noun it describes or at the end of a sentence.
JA: あそこに置いてある自転車は弟のよ。
EN: The bicycle that is parked over there belongs to my younger brother.