Examples

White can sacrifice the exchange with 1.Rxe6. Recapturing with 1...Qxe6 lures the queen to e6, where it can be attacked with the pin 2.Bd5.

Sometimes the rear piece can be decoyed into a pin:

White can sacrifice the exchange with 1.Rxg8+. Recapturing lures the king to g8 1...Kxg8, which White can use to pin and win with 2.Bd5.

Sometimes a decoy can be combined with additional motifs:

The rook on e2 is protecting the knight on e3 and the square f2.
It is overloaded, and White can win with 1.Rxe3!, combining decoy and deflection. After the rook recaptures with 1...Rxe3, it is deflected from protecting f2, and also decoyed to e3. White can then win the rook back with the pin 2.Bf2, having won a knight in the end.

Related combinations

Trade into pin is similar to decoy into pin, but the first move is a trade instead of a sacrifice. It is also possible to decoy a piece to a square where it can be attacked in a subsequent tactic other than a pin. And you can decoy the king into checkmate.