In the given example, if you click two squares down from the 3 in the 2-3-4 at the bottom, if you get a 3 it may reveal a 3 that will open up all the spaces around it. Which in the process may reveal what kind of 4 it is.
If you click on the square three to the right of the top 1, if that shows a 1, then a lot of surrounding squares can be revealed and again you may "walk up" to a more definitive mapping of the bombs.
I'm not even sure those are the optimal examples, but when I minesweeper it was for speed.
The real advantage, especially at this stage of the puzzle, is that those squares might quickly lead to another big field to be revealed.
If you click on the square three to the right of the top 1, if that shows a 1, then a lot of surrounding squares can be revealed and again you may "walk up" to a more definitive mapping of the bombs.
I'm not even sure those are the optimal examples, but when I minesweeper it was for speed.
The real advantage, especially at this stage of the puzzle, is that those squares might quickly lead to another big field to be revealed.