All content on the web pages is added/manipulated through the use of widgets. Each widget is designed to allow the user to implement content/functionality on web pages without having to understand the inner workings of HTML (the primary language of the web). Once the page layout is ready, content editors can drag-and-drop widgets from the toolbox to define how you want the content to be displayed.
Another added advantage to using widgets is that on the administrative side, they can be easily re-styled in a single place, and the change will take effect in every location the widget is used.
The widget toolbox is located on the right side of the editing window and contains all of the controls that are used on pages.
By default, the toolbox displays all widget under the heading, Content. For convenience, the most commonly used widgets are under this heading. Widgets under the other headings are typically only used for administrative or other special purposes, with the exception of Media.
To place a widget on the page, simply drag it from the toolbox and drop into a container on the page.