The invention of zero was made so that there would be a number for nothing
if you have nothing, you can't just say "nothing" in mathematics, so it was named zero. Also, it would have been impossible to write "ten" without a "zero". Zero literally was a filler for an empty space.
Take for another example 206. Without the zero, it would be pronounced twenty-six, even though they were really trying to ask for two-hundred-and-six. Without the zero, numbers would be a lot harder to be made out. (especially when you are trying to say you don't have any of that thing! which means i have zero of that thing lol)
hope this helps
