YITH Footer Banner gives you the ability to have a floating banner in your theme.
Worked great with WP 4.6.
As a front end developer, I'm always on the lookout for well coded plugins that work as advertised, allow for easy customization, and implement fast. This one was up and working within 10 minutes. Ran with no plugin conflicts, no style conflicts, no js to tweak. The YITH Footer Banner plugin was a real time saver and looks and performs great.
It just works as intended. Great configuration options.