Tackling is the core skill when it comes to defending, which involves regaining possession of the ball for your team – or at least interrupting possession so your team can recover and help defend. Excellent defending and tackling takes patience, courage, strength and determination. Generally speaking, there are two types of tackling: tackling for possession and tackling to disposess. The difference between the two is the intent. One uses a tackle to win the ball back while the other tackle simply aims to interrupt the flow of play and perhaps poking the ball to a fellow defender for them to gain possession.
Excellent defensive posture needs to be emphasized: knees bent, eyes on the ball, 45 degree angle. Without good technical posture, defending is more difficult.