Before I get into it, first of all, why did I feel like I needed to do this? Dunno, just to help people i guess lol
Let’s begin!
Has this ever happened to you? You fire the remote which has a cooldown of per say 1 second. Within that 1 second, someone else fires but cannot execute the script. That’s because of a remote placed in Replicated Storage which makes it a global remote event meaning everyone fires 1 remote. Which is received by 1 script(I assume. Should be!!). Well, that’s a global cooldown. It looks something like this
local debounce = false
game:GetService("ReplicatedStorage").RemoteEvent.OnServerEvent:Connect(function(plr)
if debounce then return end -- If debounce == true then return end meaning can't run the code below if it's true!
debounce = true
print("Fired!")
wait(5)
debounce = false
end)
-- What happens here?
--[[
Well, pretty simple. The remote event recieved in this script was placed in replicated storage and couldn't be used twice within 5 seconds(Assuming there is no latency which there will be)
What does it cause?
Let's say John fires the remote and gets past debounce since it's false but then after he uses it, it's true. While the debounce is true, Jessica canno't get past the debounce within 5 seconds
]]
-- Is there a way to stop this? Yes! Just follow these instructions.
local tableOfCooldowns = {}
game:GetService("ReplicatedStorage").RemoteEvent.OnServerEvent:Connect(function(plr)
if tableOfCooldowns[plr] and os.clock() - tableOfCooldowns[plr] < 5 then return end -- Return if the player is in the table AND 5 seconds has not passed since that SAME player has fired the remote event.
tableOfCooldowns[plr] = os.clock() -- Add the player to the table with os.clock(). Which goes up every second(Maybe ms too but not sure.)
print("Fired!") -- Prints "Fired!"
end)
-- What is the difference here?
--[[
We added John to the table when he fired the remote event and a cooldown for *JOHN* has started.
After John, Jessice fires within 5 seconds and could get past the cooldown.
Why is that?
Well as you see, we made a cooldown for each individual player that fires the remote event with a table. Tables are useful!
]]
Hopefully this was helpful. I’m new to dev forum, hopefully will get better 
This can also be used for events like Touched to damage multiple people at once without dealing too much damage than it’s supposed to!
