The Internet can be complex. Usually if your changes are not being seen it is due to one of the following reasons:
Your browser is cached – To try and fix it, go to your website in a browser then hold the shift key on your keyboard while clicking the “refresh” button in your web browser (usually the circular arrow). This is called a “hard refresh” where it will go back out to the server and download the latest version of your website again.
The web server is cached – For this you can power on and off your modem. You might need to leave it off for several minutes.