Depends on the flop

Lets say you have Ts8s, and the flop comes down 9s5s3h. You're trying to fold out the high cards here, raise this from early position to make it look like you caught a piece of that 9, maybe with K9 or A9. From late position take your free card and see if you hit the nuts.

Same hand, the flop comes down AdJs3s. Someone probably has TPGK and probably isn't planning to fold, but if it checks around and there are only 1 or 2 in the pot, this is a good place to try a pot steal from late position. Early, you're probably betting into a caller, giving you poor odds.

Also, in multiways, I raise early in hopes of getting enough callers to give me odds, and check late for the free card.