Types of Currency in Path of Exile 2
Orbs and Crafting Materials: These are used to modify your gear and improve your items. Some notable types include:

Orb of Alteration: Changes the modifiers on a piece of Path of exile currency equipment.

Orb of Augmentation: Adds a new modifier to an item with fewer than the maximum number of affixes.

Orb of Chaos: Rerolls all modifiers on a piece of equipment.

Exalted Orbs: Adds a new random modifier to rare equipment.

Essences and Fragments:

Essences: These are essentially crafting materials that can guarantee specific modifiers on an item. They can be used to upgrade an item’s rarity, or modify it with powerful, specific stats.

Fragments: Items that you collect during your journey and use for various quests and POE currency for sale events. They also come into play during the endgame content, especially when summoning bosses or opening portals.