The header is found at the top of a website.

There are two items that you will find in almost every header of every website in the world:

  1. Logo or title of the website (and possibly the tagline)
  2. Navigation menu

You might also find these items in the header of some websites:

This is definitely not an exhaustive list of things that can be found in the header of a website, but they are by far the most common header elements.