Staking is a popular method of earning rewards in the world of cryptocurrency. It involves locking up a certain amount of cryptocurrency in a wallet to support the network and increase its security. In return, users are rewarded with interest or fees for their participation in the network. Staking is commonly used in Proof-of-Stake-based blockchains such as Ethereum, Cardano, and Polkadot. It's an important aspect of network decentralization, as it enables users to actively participate in securing the network and earning rewards while doing so.