Why was this a brilliant move?

https://www.chess.com/analysis/game/live/84ee9032-06f0-11f0-9fbb-8dab2e01000f?move=35&tab=review

https://www.chess.com/analysis/game/live/84ee9032-06f0-11f0-9fbb-8dab2e01000f?move=35&tab=review