Within Sitefinity, there are two types of content: single-use and reusable.
This content is created and managed on the same page that it is displayed on using the pencil icon widgets.
Single use widgets have a pencil icon. These are good widgets for content that you only intend to appear on this particular page (and will not be reused on other pages of your site). Perfect for features and announcements. Just drag the widget from the right column onto your page and choose Create Content or click Edit on the widget to add content.
This is content that site builders plan on using on multiple pages or needs to have a consistent structure. It should be created and managed in the “Content” tab area. This content type is usually displayed on a page using the pancake icon widget.