Typical trial on services and apps are 30-day, but Google is now offering users a 4 month free trial on some services, including Play Music and YouTube Red. This is a great way to test services before committing $9.99 a month to the services, and also saves you $40.
To apply for this offer, you have to be a new Google Play Music subscriber. To sign up, head over to Google Play Music’s website. This deal is part of “Cyber Week”, so you better hurry and sign up before it ends. If you are not interested in the services, you can cancel your subscription before the 4 month trial ends, otherwise expect to be charged $10.