No special actions required, all sites you make with Mobirise are mobile-friendly. You don't have to create a special mobile version of your site, it will adapt automagically.
Mobirise is an easy website builder - just drop site elements to your page, add content and style it to look the way you like.
Mobirise offers many site blocks in several themes, and though these blocks are pre-made, they are flexible. You can combine blocks in different ways on your pages.