Ultimate team is a fun, downloadable content released by fifa.
It consists of starting with a bad squad, playing games to make coins and then buying players.
There are three catogories of the majority of things in ultimate team. Bronze, Silver and Gold. Bronze being the worst, then silver and then gold.
Occasionly when playing matches your players will get injured or run out of contracts after the match. If your player gets injured he will have to sit on the sidelines for an allocated time. If your player runs out of contract you will have to buy a Bronze, Silver or Gold contract to get your player back into the game.
After you play a few games your players fitness will go down. You can either put your player on the bench to get energy back, or buy a fitness card.
Also if you lose a game your teams morale may go down. To address this you can buy a morale card from the market.