In simple, non-technical terms, how does one prevent a web page from being cached on an NGINX server?

For example, page is updated several times a day.
However by default clients cannot see new content without force reloading page.

Is there a header or something that can be put on page to prevent NGINX caching, or force browser to refresh at each page load?

A link to the answer would be fine as well if you don't want ot rehash the answer.

Many thanks!

In case I was not clear I'm looking for a user level solution; something clueless web designer can add to his .htaccess or header of his web page to ensure web page refreshes with latest content in browser.

Thanks.