Definition of pot odds
The odds of pot indicate the ratio of the bet you have to put in relation to how often you will hit your draw or how often you will improve your hand. Odds of pot indicate whether or not a call is profitable in the long run. pot odds are often expressed as 2:1 or 3:2 or 4:1. In the 2:1 example, we will say "two to one". Two to one means that out of 3 occurrences, 2 times we will not touch our draw or card and 1 time we will touch.
An example of pot odds in practice
The dimensions of the pot are especially useful at the flop and at the turn. They help us to evaluate the profitability of a call. Let's take an example of a tournament. There are 20 big blinds in a pot to flop. Your opponent pushes all in his last 10 blinds, so he bets 10 in 20. You look at your cards and you have a flush draw. You know that a flush draw on 2 upcoming cards (turn + river) will have odds of 2:1 (twice you don't hit, once you hit). Here you have to invest 10 to win 30. On 3 times you will lose twice (so 20 euros loss) and hit once (30 euros win). Gains - losses (30 - 20) = 10 euro profit in the long run. The odds of pot are favorable, you can call!