It is usefull in a lot of situations:
- on an ugly flop, for example 678 (+ a flush draw) being the first one to place the bet will get you the pot
- also you can donk with a top pair, cause a lot of players also tend to overplay their cards and find it extremly difficult to fold their AK/AQ/AJ that missed, or their 2nd/3rd pairs so you can extract value in that way.