Whenever you add something new to your web page or when you make some changes, they need to be published to become publicly available and visible to your visitors.
Publishing of the page changes can be done in two ways:
1. Through the "Publish changes" link that is located on the top (black) menu of the page editor. The link will be colored in red if there are changes that are not yet published.
2. Through the "Publish changes" button that you can found in the right menu.
By pressing the "Publish changes" link, the status of the web page will be changed from "modified" into "published".