In reviewing the answer to this post, I don't understand why 0 seconds is used for best practice here:
ExpiresByType text/html "access plus 0 seconds"
I think this means that whenever a user visits the website, the html page is always downloaded instead of pulled from cache. Is that right?
Is this what people typically set for this variable? If so why? If not, which scenarios benefit from setting it to 0 seconds?