What are these decimal numbers that I see displayed in front of every move.
This is the computer evaluation for the move. The evaluation is an estimation by how good or bad a move is. The more positive the number, the better for White. The more negative, the better for Black.
You can read more about it here: https://support.chess.com/article/656-what-do-the-computer-evaluation-numbers-mean-like-225
What are these decimal numbers that I see displayed in front of every move.