Keep the player on your shortlist. The game won't always notify you if he's reaching peak form; you need to check in and decide when to pull the trigger.
Sell a player for a decent fee to balance the books now, knowing you can bring them back once your finances stabilize.
Even if the club accepts the bid, the player can still reject the contract if they feel they've outgrown your club or dislike you.
Use it on 18-21 year olds who aren't quite ready for your first team but have high potential.
It prevents rivals from getting a bargain; if a rival bids for the player, you can jump in at your locked price to "snatch" him back. Tips for Success