Clipboards
Keyboard Maestro has a variety of support for the clipboard:
It provides a clipboard history, which you can access using Command-Control-Shift-V. This keeps track of the last one hundred clipboards you've copied, and is a very useful feature. You can read more about it in the Clipboard History documentation.
It provides named clipboards, which are semi-permanent locations to store snippets of information. This is not a frequently used feature, but it can be useful for storing logos or styled text for example. You can read more about it in the Clipboard Switcher documentation.
It provides a variety of actions for accessing or processing the clipboard. These allow you to build macros that operate on the clipboard. You can read more about it in the Clipboard Actions documentation.