The cost of a re raise is likely to be at least £55 whilst calling means you are feeling your opponent out cheaper. You win the pot and muck: Floating is Cheaper Your opponent checks, you bet £20 and your opponent folds. Player A raises before the flop to £10 and you call from the button. It is also a cheaper alternative to just re-raising a continuation bet as a turn bet need only be a small probing to take the pot away when an opponent is just continuation betting. The float protects you against those that like to c bet but liable to give up later, particularly out of position. Many a player will continuation bet heads up or even multi-way on certain board textures, but a smaller percentage will keep firing bets on the turn and river. It’s important that you use it against those who are unlikely to barrel off.
The poker float should be used against opposition that you have identified as continuation betting or flop betting too much. A rarely used poker phrase, a poker float is slang for calling an opponent’s bet with the sole intention of taking away the pot later in the hand.