Lots of our clients unaware of browser cache and how it effect your web browsing, specially during development when me make changes to site, your web browser keep a local copy and instead of downloading a fresh copy, browser display your local copy. This is a mechanism introduced for faster web browsing experience. This website below has a fantastic instruction how you can do this.
Simply click on the browser icon you are using and follow instruction(Depends on browser you use);
http://www.refreshyourcache.com/en/home/