No. However, browsers try to do something reasonable with whatever they are given. They will probably just ignore the extra tags. (If you want to know what your browser does, use copy and paste to make two copies of the body in the next example.)
For this tutorial, the only thing that will be inside the head of
a web page is its title, contained within the tags
The title of a page is displayed by the browser in the top bar of its display.
Here is a web page showing this: