The "3-4 Defense" is a type of defensive alignment used in American football. In this formation, there are three defensive linemen and four linebackers on the field. The primary goal is to create a flexible defense that can adapt to various offensive strategies, allowing for both strong run defense and effective pass coverage. This formation emphasizes the role of the linebackers, who are crucial for stopping runs and covering receivers. The defensive linemen focus on occupying blockers, freeing up the linebackers to make plays. Overall, the 3-4 Defense aims to confuse the offense and create opportunities for turnovers.