How i smooth this?

https://www.youtube.com/watch?v=Lso8KitmchY&t=115s. Using that video I’m learning how to sculpt a character, in 1:55 he smooths the chest using grab tool. I’m not sure what he did. Could you help me, please?image

If you hold shift while sculpting it smooths.

for what i see it equalize the terrain to the level next it so to speak, i don’t want to do that, i just want to equalize it to from where the brush comes from