After numerous updates of my site on the internet, the last few updates have not been successful. Each time I export changes they do not have any effect on my published site. I have tried exporting the whole site as well as the changed files only but without success. Each time the system has told me that the export was successful. However when I log on to my website the changes have not been made. The changes are shown correctly in test mode.

I have also changed the Google keywords on my site, but these have not been changed on the internet.

What do I need to do to get these changes shown on my web site?