Help me spot the missed win?

My Nc5 move (captured a bishop) was marked as a missed win by stockfish. I understand why it might not be the most ideal move, but as far as I understood, a missed win means that I have another move which will grant me a huge advantage. I don't see how the suggested move would improve my position to an extent of a guaranteed win or anything of that sort. Do I misunderstand the analysis or did I miss some killer move?

Unfortunately the free analysis is pretty bad.  I ran an analysis on it and came up with...

Thank you. I though it was the same engine, just hiding some of the details from you.

I don't know the details, but I don't think it runs to the same depth.  Any experts care to share their insight?

Would that make it easier to make a brilliant move using the free engine.

Idk