Find the best move for white!

I know these posts have become redundant but can someone tell me why this move is brilliant?

What is the tightest game of chess you have ever won?

[BLACK TO MOVE] From my most recent game

Even my brilliant move sucks?

How bad does the coach think I am that when I finally make a mediocre move it calls it brilliant?!

Damn this felt good. Opponent just resigned.

Black to move, mate in 3

Brilliant, why?

wanted to develop bishop on f8 to attack the king and got a mate shortly after but it feels like this attack couldve been easily disarmed

My first brilliant move in a very long time, quite proud of this one

Troll opening got trolled

Mate in 8