There are plenty of times where you might want to refresh only part of the page's content, leaving the static content to be, well, static, and refreshed at the user's discretion. Reloading an entire page on a user can be jarring, confusing, and doesn't make for a great user experience and sense. refreshing just these particular areas of a page is a good option. This way, you can make sure your targeted content is updated, without alienating any users. exemple https://whitefoxcreative.com/developers/ajax/using-ajax-to-reload-only-a-div/