Starting from the Maglr dashboard go to publication area at the top of the dashboard. Then click on the publication, or click on the green Edit button, that you would like to make live.
Click the blue Publish button at the top right of the dashboard and make sure you have the Activate your Publication, Set Active option on, doing so will then make the publication go live and ready for you and many others to see.
Once the publication is live, while on the dashboard, on the left side you will see a Domain URL, this URL can be shared wherever you like. Searching the URL through a desktop or various mobile devices will allow them to see the publication.
Even while the publication is live, you can alter settings of the publication or edit the publication itself through the editor and then update it to the live version.