In reply to Christena.

Are you using Google AdWords? Perhaps Google will charge extra for that. But really, a penalty in search result rankings is likely worse! BraveNewCode's WPTouch plugin is the easiest solution I know of to make a WordPress site mobile-friendly. The free version is very capable and can be found on the WordPress plugin repository. If you need additional functionality or some nice mobile-friendly themes, a pro version of the plugin is also available. All this being said, the best long term solution is to use a mobile-friendly theme. I would suggest planning ahead for your next website refresh to ensure that you make your WordPress theme mobile-friendly.