What is the ATM in Decentraland?

Could you elaborate on the significance and functionality of the ATM in Decentraland? I'm curious to understand how it operates within this virtual world and what role it plays in facilitating transactions and interactions. Does it allow users to withdraw or deposit digital currencies? How does it integrate with the overall economy and social structure of Decentraland? Furthermore, is it a centralized or decentralized system, and how does that affect its reliability and efficiency? Understanding these details would greatly assist in grasping the full scope and impact of the ATM in this emerging virtual space.