When changes are made to web pages, the change does not always immediately appear in your browser window. This is because a previous version of the web page has been stored or “cached” in your browser application. Clearing your cache prevents your browser from referring to the last, and possibly out of date cached page. Below we have linked the relevant support pages for commonly used browsers.
Chrome
https://support.google.com/accounts/answer/32050
Safari
https://support.apple.com/en-gb/guide/safari/sfri47acf5d6/26.0/mac/26
Firefox
https://support.mozilla.org/en-US/kb/how-clear-firefox-cache
Microsoft Edge
https://support.microsoft.com/en-US/edge/view-and-delete-browser-history-in-microsoft-edge