The RPG has a one-square damage range. When you build 4 walls around you, the space in between is called a square, which there are thousands of on the map. If someone shoots an RPG and it lands exactly a square away from you, it will deal damage - but if you moved a tiny bit back before, you would be alive. The same applies to grenades, boogie bombs, smoke grenades and impulse grenades. If the RPG hits in the corner of one square, like in the diagram below, it will damage 4 different squares.
Red represents highest damage - usually between 140 to 240.
Orange represents normal damage - usually between 80 and 140.
Yellow represents low damage - usually between 20 and 80.
The black dot under the player shows where they are, and the RPG image shows where the blast hit.
As you can see, 4 squares around the blast are affected, and if you are a square away from the blast you may still get fairly high damage, leading you to die.
Hope this helped.
Rarity Levels
Common or White is the easiest found rarity. The basic form of several weapons (Pistol, Revolver, Assault Rifle, Tactical Shotgun) is found as greys very commonly.
Uncommon or Green is the second most common. A basic form with usually 1 to 3 more damage is found. However several weapons are green onwards (EG: Pump Shotgun, Hunting Rifle, Tactical SMG) can be found.
Rare or Blue is the middle tier rarity. Basic forms, not advanced weapons, can be found - every single weapon apart from a Guided Missile, a Semi-Auto Sniper Rifle and a Heavy Shotgun or an advanced gun can be found in blue. Blue weapons have about 5 more damage.
Epic or Purple is the second best rarity. No Basic forms can be found in Purple - they are upgraded. Semi-Autos and Heavy Shotguns can be found purple onwards.
Legendary or Gold is the best tier. They are found primarily in Supply Drops - balloons that spawn in shrinking intervals of time, starting at 3:00 min. They do the most damage - usually 6 to 10 more than the grey ones. There are only two Legendary consumables - bush and chug jug.
Basic and Advanced Forms
The revolver can be found in 4 different rarities. White, Green, Blue, and Purple.
The Hand Cannon, a different weapon, is very similar with a clip of 7 rather than 6. It does more damage and fires slightly faster and accurately with a 9 damage difference.
Best Answer
It does not provide any gameplay advantage to thank the bus driver. It is just a little fun thing, probably based on the "thanking the bus driver makes you a better/more successful person" meme.
Source: https://www.gamerevolution.com/guides/421551-fortnite-bus-driver-how-to-thank-the-bus-driver-in-fortnite