The website dictionary.com brings the following definition to cache:
a temporary storage space or memory that allows fast access to data.
Your internet browser stores websites' data in order to increase its performance when loading information. However, sometimes this can cause problems when working with web applications. This article from techtarget.com explains what issues are caused by browser cache:
Therefore, some web application-related issues can be solved by clearing your browser cache. For most computer-based internet browsers, you can open menus used to clear cache, cookies, and history, by pressing Ctrl-Shift-Delete (Windows OS) or Command-Shift-Delete (Mac OS).
In case you need further information to help you clear your browser cache, please refer to the content below: