How to activate 1 Months Xbox Live Gold Membership Card?
Visit this address: http://www.xbox.com/redeemcode
Sign in with your Microsoft account credentials
Enter the 25-character code and Confirm

You can find additional support for your Xbox Live account here: https://support.xbox.com/contact-us

Play online with Gold. Gaming on Xbox One is better with Xbox Live Gold. Join the best community of gamers on the fastest, most reliable console gaming network. Quickly find people you’ll love to play with using Clubs and Looking for Group. Get 2-4 free games every month, and get up to 50-75% store discounts on Xbox One.