I've made edits to my Coming Soon page and have pressed the activate button but it's not translating to the actual page when I try to view it online. How can I fix this?

Usually, if Shopify's "password protected" feature is enabled (it's default enabled on new stores), it prevents the app from showing. 

In your online store's main Shopify dashboard, go into Online Store > Preferences and scroll to the bottom to disable password protection (uncheck the "Enable password" box).