What means Flex-Tonie?

Hi, can someone please explain what the flex-tonie setting does? I’ve read a bit about it but don’t understand how it works.

A flex-tonie was a way in the old webgui to quickly assign content to a specific tonie.
The flex-tonie was the primary target for new content. This is not really in use any more, as the new webgui evolved and there you can easily assign new content to each of your tags.