Get a Compensation for an Isolated Pawn
"In chess, an isolated pawn is a pawn which has no friendly pawn on an adjacent file. An isolated queen`s pawn is often called an isolani. Isolated pawns are usually a weakness because they cannot be protected by other pawns."(wikipedia)
There are some openings which "produce" such an Isolated Pawn "automatically" For example many variations in Semi-Tarrasch-Defense
As Isolated pawns have a strong tendency to become a weakness, there has to be found some compensation for it. The knight outpost on e5 is a typical one
In the following game GM Symslov got such a good compensation by a well-placed rook on the seventh row supported by a typical knight outpost on e5