What is value-betting? Value betting is when you bet with the intention of extracting value from weaker holdings than yours. The importance of value betting appropriately cannot be stressed enough. It is so important that value betting alone can separate winning players from losing ones.
When value betting we walk a thin tight-rope. When we have a value hand we want to make as big a bet as our opponent is willing to call with a worse hand. When value betting our image, our opponents tendencies come into play. If our opponent is a loose caller, we can value bet bigger and expect to get called by a wide array of hands. Convesely if our opponent is a very 'tight' player we should opt for for a smaller bet size. Also we should consider the amount of weaker hands that can call: sometimes there are simply not enough weaker hands in our opponents 'range' to justify a value bet and we should perhaps check instead.
An example of being dynamic with value bet size would be:
We hold the following hand:
We obviously raise pre-flop from the button and the BB calls, the flop comes out like this:
The BB checks to us and we bet and he calls. The turn comes the:
He checks to us and we value bet our flush, he then calls. The river is:
He checks to us and we need to decide to value-bet or not?
First, we have the best hand, so there is no possibility of losing and therefore checking behind is not an option. We definitely want to bet here, but how much? The board is really scary for our opponent and only a very few hands will call here, therefore going with a small size bet is the best option.