Happy to!
For proof of stake blockchains, staking your native token helps secure the network. In return, you earn a reward. That yield varies across different chains (examples: ETH, MATIC, SOL, AVAX). You do this using a self custody wallet rather than a middleman (CEX).
There is no reason to leverage earn products on CEXes when the risk is greater and the yield lower. DeFi beats CeFi in both categories.