After White plays this move...
This is Black’s most common reply
White secures the center with this move
Now usually Black brings out the Knight
Black puts more pressure on the center
Black puts more pressure on the center
And now this is a good plan for White
The idea is to advance here
Challenging this pawn
And freeing this square for the Bishop
Black is forced to either advance
Or take here
And there will be no central pressure anymore