I have been instructed to clear the cache on my browser but I’m not sure how to do this?
This website http://www.refreshyourcache.com/en/home/ has some great guides on how to reset the cache on most browsers.
The reason that we sometimes will ask you to clear your browser is because your computer may be viewing an out of date version of your website. When your computer accesses a site it downloads pieces and stores them so that the site loads faster the next time you access it. Clearing this cache means that the out of date information is flushed away and your computer will then access the fresh new data on the website.