You can also find this information directly under Profile -> Help -> Currency & Items.
The in-game currency. Can be automatically deducted to buy items for in-game use.
Each match requires 1 Energy to play. Can be purchased in the store or slowly recovered over time.
An item that can be used to change the photo category during a match.
An item that can be used to remove 2 incorrect answers before picking your answer.
An item that, if used before answering a photo, will allow you to make another choice if your answer is incorrect.
An item that, if used before answering a photo, will replace the current photo with a new one.