Same old story, this is an old and outdated scam strategy, but since this post is coming from a newbie, then I believe maybe this is the first time op is coming across such a message.

When you import that wallet into your wallet, you will discover that there is no Ethereum or bnb (depending on the blockchain in question) to pay the gas fee for the fesilitation of that transaction, in this type of scam strategy, the scammer is playing on the victims intelligence, they know you would want to withdraw that money and there is no way you can withdraw without first of all sending eth or bnb to that address which will act as the gas fee that will fesilitate the transaction ~ Now, the eth or bnb you, the victim is going to be sending to that address is what the scammer is looking for, the address has been coded by the scammer to automatically and in The same seconds, send out what ever amount of eth or bnb that's sent to that address... This is how many unsuspecting victims will end up loosing their eth or bnb to the scammers