Today, we are living in a mobile-first world, where the number of handheld devices has surpassed the number of desktop devices. Today, more people are using smartphones for their day-to-day activities than ever before. Furthermore, Google also gives priority to the websites that perform better on the mobile devices. In such scenario, the Magento 2 store owners can not afford ignoring the potential of mobile traffic. It may happen that your Magento 2 theme may not display the content properly on the mobile devices and may not be responsive enough. Therefore, you may require to setup a separate theme for desktop and mobile in Magento 2. The default Magento 2 admin panel allows the store owners to set different themes for different user agents.