what does (hit) mean?

i was in the wiki and it said this line of code

function(hit)

(Started learning scripting a week ago)

what does the (hit) mean i looked it up on the wiki. When they try to explain it the definition it doesn't make sense to me so can anyone tell what does the hit mean exactly?

The actual word 'hit' doesn't necessarily mean anything -- It's a parameter. It's not too different from a variable.

Some functions have built in parameters, and some don't. With non-built in ones, you can even make up your own and call them with an argument (basically a parameter, but it's used in the actual call to the function).

For example:

script.Parent.Touched(connect(function(hit) -- Hit could be anything. Part, object, bob, whatever. The touched function has a built-in parameter, being the object that touched the part.
	print(hit.Parent) -- You can use the parameter within the function, but not outside of it unless you set a variable to the value.
end)

As I previously mentioned, you could make your own functions with parameters:

function add(a, b)
	return a + b -- This would return the parameter a, added to the parameter b.
end

print(tostring(add(7,3))) -- I used the arguments 7 and 3, this would print 10.

Hope this helped!