I'm a beginner, 800 rating in chess.com, when I'm analysing, it shows up this move! Why would sacrificing knight would be best here? Just coz of missing out on castling? Please explain

The Elshad System, PDF, Chess Openings

chess.com is that really such a bad move ? it won me the game after all : r/chessbeginners

My month-long quest to become a chess master from scratch, by Max Deutsch

Is this a LiChess thing or am I missing something? How come I can't move that knight? : r/chessbeginners

I'm a beginner, 800 rating in chess.com, when I'm analysing, it shows up this move! Why would sacrificing knight would be best here? Just coz of missing out on castling? Please explain

Five Lessons From Scholastic Championships

Who's gonna tell him? : r/chessbeginners

beating all the advanced bots on chess.com

My month-long quest to become a chess master from scratch, by Max Deutsch