Latest version of homepage

I’m not sure if this is the right place to ask, but can’t find the answer at Google.
Where do I find the Script/Cookie - or whatever it takes (if any) - that ensures viewers to see my new updated homepage, and not the cached one?
And it’s not the F5 function (or similar) I’m looking for!

Might take a look at this on stack overflow:

looks like it covers much of what I was looking for - thank you Doug
now I’ll spend some time read and evaluate