The aim of mobile optimization is to create a version of your site that will load well on your mobile devices (phones, tablets, etc.).
Wix gives you the option to disable the mobile version of your site and instead display the desktop version of your site on mobile devices. However, this is not recommended, as your site can appear distorted because of the different screen dimensions. Instead, you or a professional should work to optimize your device through the mobile editor. Please be aware that your site may not appear the same way on all devices; for example, iPhones process and load differently than Androids, and even the model year of a phone can change how a page is displayed.