After every round of Team Vanquish, every game of Gardens and Graveyards, and every heroic last stand in Garden Ops, players earn PvZ coins. These coins can be used at the Sticker Shop, an in-game store that lets players purchase sticker packs. These packs include consumable items to help keep players in the fight during Garden Ops, Potted Plants, Summonable Zombies, weapon upgrades, character customizations, and even unlockable character Class Variants.
Plants vs Zombies Garden Warfare eGuide The Sticker Shop