In order to speed up web browsing, modern web browsers are built to download web pages and store them locally on your computer's hard drive. So when you visit the same page for a second time, the browser speeds up loading time by loading the page locally from cache instead of downloading everything again.
Although storing Internet cache makes web browser faster you sometimes want to overwrite this defualt behaviour, for example to see recent changes made to a webpage you just uploaded.
Clearing Cache Memory
This is done by doing what is called a "force refresh" by pressing both control and F5 buttons simultaneously on your keyboard (depending on your browser).
Depending on your operating system all you need to do is the following key combination:
Windows: ctrl + F5
Mac/Apple: Apple + R or command + R