Compared to mining, staking is another mechanism to check whether transactions are correct and to secure the network. Here, however, no computing-intensive hardware is required, but it should be ensured that you are authorized to check by having a certain number of coins on your own wallet. This wallet must be permanently active so that a constant comparison can take place.
You are rewarded with staking for having a certain minimum number of a certain coins on your wallet and keeping it open, i.e. keeping it active