The addition of C4 in PUBG was a welcome surprise as it's extremely potent and packs quite a punch. Unlock most similar explosives in other shooters, they do minimal damage and have limited range which makes no sense for C4.
C4 can decimate a building and wreak havoc on any type of terrain and PUBG actually makes C4 feel powerful. Players can take damage even on other sides of a building.
And Redditor DabbinPugDad shows a clever trick in baiting an enemy team to run into the radius of a C4. For one, you can cover the C4 and hide it well, making it hard to see the flashing light, but it also has a rather loud beep that gives players a chance. If you avoid the beeping sound, you should be fine, but that's where the smoke grenade comes in handy.
You would think it's about the smoke covering the C4 itself, but the sound of the smoke grenade releasing will actually cover the beeping sound. So if you hide the C4, use the smoke grenade, the enemy players won't know what hit them.