How to watermark a page in LaTeX

When writing a document in LaTeX it is useful, sometimes to be able to display a watermark on the page. This can relay different messages to the reader for example:

To do this, we can use:-

\usepackage{draftwatermark} %watermarks
\SetWatermarkText{Copyright} %set message
\SetWatermarkScale{5} %set size

You can view an example in Overleaf here

References