Shield potions grant Fortnite players additional shield points, which act as armor against any damage to your health. While shields are great, you don't want to rely on them. Shields are an essential item and crucial for most victories. While they are useful, shield potions don't protect against all damage, only player damage. Any damage caused by non-player effects (falling, errant explosions, the storm) will still take away your health. That said, don't waste any shield potions. But also refrain from keeping shield potions until the end, otherwise you might not live long enough to use them.
Make sure to use the small shield potion. It's perhaps the most underrated item in Fortnite Battle Royale; many players don't even bother to pick it up. Small shield potions are common throughout each area. If you're smart about it, a few small shield potions can protect you throughout each game. If you are using slurp juice, you can always fill your shield bar to 50 by using small shield potions.
Finally, use cover when using a shield potion. It takes five seconds for a shield potion to have an effect, and while that might not seem like much, it only takes a few seconds to die from a sniper or headshot.
MORE: How to Stay Alive in Fortnite Battle Royale