Compactness describes how closely a team’s players and lines are connected. Horizontal compactness limits space across the field; vertical compactness limits gaps between the forward, midfield, and defensive lines.
What to watch
A compact shape can make central passes harder and allow teammates to support pressure. It also involves tradeoffs: protecting the center may leave space wide, while stepping up can expose space behind.
An illustrative example
As the ball moves toward one sideline, the defending midfield shifts together and the back line adjusts behind it. Check both distances between players and the passing routes that remain open.
Avoid this mistake
Compact does not mean every player should crowd the ball. A still image can hide the team’s movement, speed, and responsibilities on the far side.