Cache and cookies come from your web browsers and act as a memory of your online activities. They can become problematic if they build-up for extended periods of time and it is a good idea to clear them out periodically. Also, cache and cookies can interfere with certain functions and/or delay updates. Clearing your cache and cookies can be a good first step in troubleshooting problems you might encounter.
Internet Browsers - Clearing Cache and Cookies
Clear your cache and cookies to make sure you are getting the most recent versions of the website.