in move 11. , the engine asks me to move bishop e6 to win material through a tactic. what is it?

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Moontorc
[Event "?"]
[Site "Chess.com iPhone"]
[Date ""]
[Round "?"]
[White "Moontorc"]
[Black "renttonn"]
[Result "1-0"]
[FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]
[WhiteElo "216"]
[BlackElo "174"]

1. e4 e6 2. f3 Nf6 3. g4 e5 4. h4 d5 5. g5 Nh5 6. Bh3 Ng3 7. Rh2 Nxe4 8. fxe4 dxe4 9. d3 Qe7 10. dxe4 f6 11. c4 fxg5 12. hxg5 Qb4+ 13. Nd2 Bc5 14. Nf3 Bd6 15. Bxc8 O-O 16. Bxb7 Qxb7 17. Nb3 Qxe4+ 18. Qe2 Qf4 19. Bxf4 Rxf4 20. Rh4 Rf5 21. c5 Be7 22. Qd3 e4 23. Qxe4 Rxc5 24. Nxc5 Bxc5 25. Qxa8 {1-0}
Moontorc
Move 16*