Implied odds?

If the concept of pot odds gives you a reason and a betsize for the optimal math, then implies odds gives a reason to go above pot odds.

Implied odds say that if you can get deep into an opp's stack, it may be worth more than pot odds to call.

Example:
You are in the sb, holding 86o. You pay a little extra to see the flop, BB folds leaving 5BB in the pot.
Flop comes down 7J5 rainbow. You have a sneaky open ended straight draw.
Opp makes a 4/5ths pot sized bet 4bb . You put him on JT, JQ, or JK. You do not have pot odds to call -- You might have called if he bet 2 BB -- pot odds.
You look at the other player's stack and your own. You both have 200bb sitting in front of you.
BUT you have implied odds to call. IF you hit that 9 or 4, he might not see your straight -- I mean, who would pay extra to play 86o, right!? If your 9 or 4 hits, you have a good shot at making far more than the existing pot. You have implied odds that he will put more of his stack in to the pot -- especially if his Q hits on the River -- you are golden.

Preflop small pp have good implied odds if the other players have enough chips in front of them. It's great to call a 4bb bet (he has an ace) with your 55 if the Opp has 10x the bet in front of him, 40bb. And the flop comes down AQ5. You just might get the whole stack for that 4bb call.
Implied odds can become an excuse to make bad plays.

Be careful of hands that look like implied odds, but aren't. Flushes usually are read by the opp, and don't pay off implied odds -- there are exceptions, but they usually don't pay much more than is in the pot. Same with Broadway Straights.