https://www.polygon.com/fortnite/2018/8/28/17790602/fortnite-update-5-30-shockwave-grenade

Today’s content update for Fortnite is supposed to improve stability while making a few other, minor changes to the game. That being said, I think we have to talk about the Shockwave Grenade, Fortnite’s newest item. You can watch the grenade in action in the trailer at the top of this post.

Here’s the official description from the patch notes: