in layman term, staking is the process whereby you lock your assets on a staking period called the vesting time ( may have lots of names depends on the program) in hope to yield more profits. though outstanding as names, the staking embeds market risk. pool based requires a collective funds from different investors to contribute to nodes validation in the blockchain, the reward issued by the miners could be relatively small.
how does exchanges offer APRs/APYs over 400%? and more ? , an interesting question which many might understand.