When creating new content on a page, there is a tab called Templates (Mallar) which contains som pre-configured content elements. These can often contain a specific set of fields like header, image, text and a link for example. When using this type of element, they have a specific design for example, so that the header always has the correct format and the image is placed correctly.
Mostly they are used on the start page of a site, or as promo boxes on subpages.
This section will take a look at a couple of these, to give you a general idea on how they work.
NOTE! These elements are implemented in newer installations of TYPO3 (Pixelant Core), and might not be available for older versions.