Why clearing or refreshing your cache?
Your browser has a folder in which certain items that have been downloaded are stored for future use. Graphic images (such as buttons and icons), photo’s, and even entire web pages are examples of items which are saved or cached. When visiting a web page your browser checks if a copy of the files on the page is in its cache already. If so, it will save the visitor some downloading and make web pages load faster. Some browsers refer to its cache as Temporary Internet Files
There are some situations when bypassing your browser’s cache is preferred. Just clicking the refresh button or hard refresh (Ctrl+R) won’t be sufficient in this case, because this reloads the web page while still using the old files from the cache. You need to refresh your cache first!