CLUB Cash
CLUB Cash are used to upgrade your stadium and club infrastructure. Levelling up your club increases your Salary Cap, unlocks additional squad slots, and improves the quality of the Agent you can access (meaning you're more likely to be offered better players). You can collect CLUB Cash from your Head of Ticketing on the 'Home' screen.
Gems
Gems can be used to speed up the return of your Agent. You can buy extra Gems from the Shop.
Transfer Coins
Transfer coins are used to extend player contracts and to bring players in on loan. Rejecting a player offered to you from your Agent (or letting the offer expire in the 'Negotiations Room') or releasing a player from your squad generates Transfer Coins. You can also collect Transfer Coins from your Director of Football on the 'Home' screen.
Trophies
Your club is awarded Trophies at the end of every gameweek. When you have collected enough trophies, you'll be promoted to a higher league.
Fans
You can collect Fans from your Head of Fan Engagement on the 'Home' screen but they have no purpose in the game - yet!