Staking can be done to secure the Avalanche ecosystem and AVAX rewards can be earned in return. Staking on Avalanche with PoS blockchain algorithm requires being an authorizer or a validator. To stake AVAX, you must first create an account on Avalanche's official wallet. Then it is necessary to send AVAX to this account and transfer these AVAX's to P-Chain.
You must then select a validator by clicking on the Earn page. Here, after choosing a validator, you can continue by choosing your staking period and the amount of AVAX you want to stake. When you confirm the transaction, you will have staked AVAX.