Website updated but customers sees old version inspite of refreshing

Hi, the updated version of a website is not seen on some devices inspite of refreshing within the browser. I cannot suggest the client to empty the cache each time. Is there a code snipped that I can upload with the sites data that makes sure the updated version is shown?
Thanks in advance.

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

If this is a staging site then you could add the following meta tag to the head of the document.

<meta http-equiv="pragma" content="no-cache" />

The user would need to clear their browser cache before this would work if the page was already cached.

Don’t use this in production as it would impact the visitor experience.

Alternately you could send them a link to an updated page that appended a URL parameter like

Hi and thank you very much. Sorry, I didn’t answer earlier. It looks like the notification did not work. I look into into it.