Clipboard is something which holds the data when you press Control+C to copy any text or a file. You can view the contents of the clipboard by opening the clipboard viewer.
Problem with the windows clipboard is that, It can hold only one item at a time. Suppose you copied a text, and next a file. If you paste, file gets pasted not the text. So, every time clipboard item gets overwritten by the recently copied item.
Polar MultiClipboard solves this problem. It can hold multiple items like image, file, or text together in clip board. You can select any item , and upon clicking paste the selected item gets pasted.
Very useful tool to handle clipboard effectively.