Introduction to the Ribbon
The ribbon is a command bar that organizes a program's features into a series of tabs at the top of a window. Using a ribbon increases discoverability of features and functions, enables quicker learning of the program as a whole, and makes users feel more in control of their experience with the program. A ribbon can replace both the traditional menu bar and toolbars.
The ribbon’s command interface brings many controls out from hiding and onto the page where they can do the most good. Similar to the user interface in products like Microsoft Word 2010, the ribbon is a toolbar that appears across the top of each page and displays many of the most commonly-used tools, controls, and commands.
When you log in to SharePoint, the ribbon will be either shown or hidden. Either way, you will see the Site Actions menu in the upper, left of the page. To see the ribbon, click Site Actions, and then click Show Ribbon.
With the ribbon layout, you can quickly find the commands needed to complete the specific tasks you are working on. SharePoint has several menus, tabs, and groups of functionality for you to build your web site, but they are contextual, meaning content-specific functionality will appear in the ribbon depending on the tasks you are completing (determined by where your mouse is). For example, when in edit mode, if you click on an image, the Picture Tools menu appears in the ribbon.