Ever wonder, "why did they get rid of menus and toolbars and turn it into a ribbon?" You're not alone. So many people have asked this question, Microsoft created a video to explain.
Ribbons tie things together. In this instance, the ribbon ties together related tasks. You can also think of each ribbon as a desk caddy. Each with its own slots for related items, such as paper clips, rubber bands, etc. Like things are kept together in a slot and all tied together with a ribbon. D'oh! You put it that way and it makes sense! I just thought Microsoft was trying to make the changes sound "pretty."
If you have about 75 minutes to spare, watch "The Story of the Ribbon" Windows Movie File. I have a whole new appreciation for the wonderfulness of the Ribbon.