FIFA Coins are used to buy football players within the game so users can enhance their squad and increase their chances of winning tournaments, just like in real life. Football clubs will buy players with real money during transfer windows in January and May-August where they will approach other football clubs for their players. They will then agree a fee for the player and then commit to the transaction of the player. This is exactly what users will do within the game except with Fifa Coins.
Instead of searching the transfer market for these players users will instead search the web application on EA Sports website were the user will set his player criteria such as Position, Formation, League and club. The system will then filter your criteria and show all the available players. You will then need to wheel and deal by searching for the cheapest player that you wish to add to your Ultimate Team squad. Once you find your desired player then you will either decide to bid on the player like other auction sites such as eBay where you will wait and hope that you’re the highest bidder. Or you can ‘buy it now’ which will have a higher price than the bid fee but it will allow you to add that player to your squad instantly so you can play games with him as soon as you want!
Be wise with your FIFA 15 Coins, don’t waste them, and be economical with them. Otherwise the next thing you know you’ll have no wealth left to buy contracts for your players.