Playing your favorite games online on your console nowadays require you to pay a fee. Both PlayStation Plus and Xbox Live have a yearly or monthly fee if you wish to play online. Besides that, you do get free games and more discount for subscribing their services.
Right now, Amazon is offering 20% off ($12) of 1-Year PlayStation Plus subscription for a limited time. So if you’re interested in becoming a member of PlayStation Plus, now may be a good time to join.