If you want to upload videos, images or documents:
If you want to create formatted content that you can reuse on different pages of your website:
Once you add content to Sitefinity, you'll need a widget to display your content. Start by creating a page or navigating from Pages to an existing page where you want to display content. You'll see all the widgets in the right column of your screen.
Content type widgets (pancakes icon) draw from content you've already created. Drag a content type widget from the right column onto the page. The entire library for that content type will appear. Choose Edit to select what content you want to display and how you want it to display.
Depending on your permission level, you may only be able to make simple edits to pages that have already been built.
If you want to simply change the text or images on a page: