Geo is the primary currency of Hallownest. You'll find it by defeating enemies, breaking Geo deposits, and opening chests. Geo is essential for:
- Purchasing Maps: From Cornifer in each new area.
- Buying Charms & Upgrades: From various vendors like Salubra and Sly.
- Stag Station Tickets: To unlock fast travel routes.
- Bank Deposits: To safely store Geo with Millibelle.
Farming Geo can be tedious, so spend wisely. Early game, prioritize maps and essential Charms. Later, you'll need significant amounts for Nail upgrades and other expensive items.