Spaces in a script?

Does it matter how many spaces I can put in a script? I've been wondering why there are spaces, here's an example so it won't work.

"Blah blah blah" "Some random code with spaces"

Can anyone tell me what and why that's user and how do I use it and when will I use it"

It doesn't matter how many spaces you use as long it isn't in between a word.

Example:

if 1  == 1 then -- the word 'if' is written normally 

end

i f 1 == 1 then -- the word 'if' in not written normally

end

You would pretty much write like you would in the real world.