what is the key advantage that sets a distributed ledger apart from a centralized server

A distributed ledger’s key advantage is decentralization : no single central server controls the record, so the system is harder to tamper with and does not depend on one point of failure.

Why that matters

• Resilience: if one node goes down, the ledger can keep operating because copies exist across the network.

• Transparency: participants can verify the same shared record, which improves auditability and trust.

• Tamper resistance: changing past entries is much harder because updates are validated across multiple nodes.

In plain terms

A centralized server is like one office filing cabinet. A distributed ledger is like many synchronized filing cabinets kept in different places, so one bad actor or outage is less likely to break the whole system.

If you want, I can also give you a one-sentence version or a distributed ledger vs centralized server table.