In limit you make your money in small incrememts. You have a hand that will win more often then your opponents average hand.

Say you have a guy limping in with T8s, A3o 44 and K9o.

You are putting in 20% of the money on a hand that will win 24% of the time.

While T8s and 44 are slight favorites to you, K9 and A3 are huge dogs in the hand, and you will get more money out of them when you hit.

You can also "buy the button" with your raise, or force out the blinds to better protect your hand post flop.

If you are in the blinds it is a value bet.

You just need to make sure that if you miss the flop that you don't bet into 4+ opponents, and if you do, it has a purpose - like a free card play. If you call bets have odds for your discounted over-cards.