About the 14 Day Trial Card:
This code activates your XBOX Live GOLD service for 14 days. XBOX Live GOLD allows you to download upgrades, demos, Arcade games, and all the cool stuff for personalizing your dashboard look.
With Xbox Live GOLD you can also participate in online multiplayer mode with people from around the globe.
With Xbox Live Gold you can:
Take gaming to the next level with online multiplayer
Stream TV shows and HD movies on demand through your Xbox
Enhance your gaming and entertainment experiences with your smartphone, PC or tablet, using Xbox SmartGlass.
Xbox Live Gold membership extends across Xbox 360 and Xbox One.