World of Tanks/Gameplay

Credits
Major in-game currency. Earned in battles or purchased with gold.

Gold
Additional in-game currency.

Premium
A Premium account gives 50% bonus with credits and experience. The Premium account is paid for with gold and will expire after the time limit is up for which you paid for. From 1 day to 30 days.

Experience
As the header say's. With this you unlock new mods and Tanks. Once unlocked you can buy the item with your hard earned credits

Free experience
It seems after every match you get a bit of free experience. This can be distributed to any mods and tanks. It can also be stacked on top of your normal experience to unlock an item.

Research
This is where you spend all your experience points. This will display a tech tree so that you may plan on how you want to go about spending skill points and getting to the bigger toys.

Garage
After each battle the tank will return to the garage where one can repair it and rearm/upgrade it further. Each tank has its limit and will reach a max with upgrades.

Depot
All excess ammo and extra goods you may of bought will end up here for you to use at a later stage if needed.