The DNS cache is a temporary database that contains records of all recent visits and attempted visits to websites and other website IP addresses. It is needed so that pages load faster when you visit them again.
The operation of cleaning the DNS cache may help in case the site does not load after moving to a new hosting site, or a substitute page is opened instead of the necessary one (due to the intervention of malware). Besides, cleaning of the cache is frequently required after the DNS gateway (modem, router) settings have been changed.
In order to clear the DNS cache in Windows: