Staking is the process by which you are rewarded financially for delegating your stake.

By staking your ADA in a stake pool you earn real rewards whilst having complete access to all of your funds 24/7, and these rewards are projected to be between 6%-10% in the first year.

You are always in complete control when staking because you retain 100% ownership of your private keys and mnemonic phrases, so never give this information to anyone that asks.