You can enable Public View for any of your plans to allow people without a PCO login to see a special view of your plan. This is a great way to share your song list with your congregation including public links (iTunes, YouTube, Spotify) for those songs. Sharing your plan to Facebook requires you to enable Public View.
As of today, you have some customization options for what the Public View includes. You can now edit your Service Type, switch to the Public View tab, and uncheck any sections you don't want to display on your public plan. This allows you to hide item lengths and regular items like announcements and only show songs.