Decentralization is associated with cryptocurrencies. It's a system or platform that is not dependent on central authority. Due to the absence of central authority, no one has control over such a system.
What is DECENTRALIZATION?
Decentralized systems are more resistant to attacks because they're not run from one place, but on hundreds or thousands of servers. A decentralized network cannot be easily "shut down" by a government or other authority for example.