The 'Skill Games' are mini-challenges designed to improve specific aspects of your gameplay, such as passing, dribbling, shooting, and defending. They are excellent for warming up or honing particular techniques. Aim for high scores to earn rewards and bragging rights.
The 'Practice Arena' is a free-play environment where you can experiment with controls, practice skill moves, and try out new tactics without pressure. Use it to perfect your free kicks, penalties, and corner routines. Regularly visiting these modes will undoubtedly make you a better player.