Mobile does not have the screen size or ability to write face that you can achieve with a desktop, but think about how much time you are on your phone versus on your desktop for something other than work.
Which one wins?
Mobile has more access to overall content total. But then think about the content you create for Instagram, blog articles, video, newsletters and others. Are they done with the intent of someone looking at it on a large screen device with a keyboard or a mobile device that may be as small as four inches big? You are limiting the impact of your content.
Take a closer look: