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.