1. You haven't updated your website while in the editor.
After you made the changes, did you click the Update website button in the top right corner of the editor?
If you didn't save the changes, your changes will not be seen on the live website.
2. You are having cache issues.
Clear your browser cache. You can find instructions on how to do it right here.
3. You are having domain name system server (DNS) issues.
Sometimes, DNS issues could be the reason why your changes are not visible on your website. The instructions on how to 'flush' your DNS can be found here.