Definition
Decentralization describes how responsibilities and power are spread across a system. In blockchain discussions, it may concern validation, ownership, governance, development, infrastructure or access. These dimensions can differ: a network may distribute transaction validation widely while an application built on it retains a small group of administrators.
How to Assess It
Relevant questions include who can join, who can change rules, whether participants can verify records independently and which services are needed to use the system. Counting nodes or token holders is only a starting point. Several nodes may share one operator, and many addresses may belong to one owner. Concentration can also arise through hosting providers, software implementations or staking intermediaries.
Uses and Limitations
Distributing control can reduce reliance on a single organization and improve resistance to certain failures or censorship. It can also make coordination and upgrades more complex. Decentralization is a matter of degree, not a feature proven by branding. It does not automatically establish privacy, fairness, accurate external data or protection from application bugs. Claims should identify which dimension is decentralized and the evidence supporting that conclusion.