A hard refresh is a way of forcing your web browser to download the most up-to-date version of a webpage. If you are trying to access Banner Admin and it doesn't seem to be loading right, you probably need to do a hard refresh.
How to do a hard refresh:
Windows: Hold down Ctrl and press F5 (Ctrl+F5)
Mac: Hold down Command and Shift and press R (Cmd+Shift+R)
Note: when performing a hard refresh, make sure you are on the Banner Admin website.